Sonic the Hedgehog (Character)

Sonic the Hedgehog is Sega's mascot and the eponymous protagonist of the Sonic the Hedgehog series. He is an anthropomorphic hedgehog born with the ability to run faster than the speed of sound, hence his name, and possesses lightning fast reflexes to match. As his species implies, Sonic can also roll up into a concussive ball, primarily to attack enemies.

Ever since stepping into the battle against iniquity, Sonic has been the champion of peace and is renowned all over the world for saving it countless times. During his many adventures, Sonic has traveled from the ends of the world to the far reaches of space and time, facing countless trials that have tested him to the fullest, earning him many titles, allies and the scorns of several foes. Well-known for his legendary cocky attitude, easy-going demeanor and somewhat short temper, yet strong sense of justice, compassion, and love for freedom and adventure, Sonic uses his abilities to protect the innocent from his world and those beyond from the forces of evil, especially his arch-nemesis, Dr. Eggman.

Sonic the Hedgehog's origin story is still a mystery, although he is said to be born on Christmas Islandon June 23, with his amazing and incredible abnormal main power and ability to run at the amazing super speeds, along with his powerful spin attacking moves.

In the past, Sonic first met the evil criminal mastermind Dr. Ivo Robotnik and the two became arch-enemies, with the soon-to-become hero facing his new adversary in at least one skirmish before the time of the South Island incident. While very little is known about their conflicts in this period, the hedgehog would quickly develop an intense, mutual hatred towards the doctor, thwarting all of his plans for world domination and defeating him with seemingly little effort; Sonic becomes the world's number one speedster superhero and a protector of all the universe. At a later point, Sonic also began to mock his nemesis with the nickname "Dr. Eggman" due to his egg-shaped body; Robotnik himself would eventually get so fed up with this name that he would adopt it as his own as a sign of empowerment.

In Sonic the Hedgehog (16-bit), Sonic heard the news about Dr. Eggman invading South Island after the doctor had discovered some powerful relics, called the "Chaos Emeralds", which were hidden on the island and which he now sought to produce weapons of mass destruction. Annoyed by Eggman's perseverance, Sonic hurried to South Island to stop him. Once Sonic arrived, he was met by Eggman, who revealed his new method to enslave the animal residents: trapping them inside robot shells. With this method, he could turn them into robotic servants called Badniks, a method that left Sonic greatly shocked.

Despite having the whole island as his enemy, Sonic resolved to save the animals and get the Chaos Emeralds before Dr. Eggman could get his hands on them. After traveling across the island while freeing the animal residents and securing the Chaos Emeralds, Sonic entered the doctor's local stronghold, where he defeated the mad scientist and drove him off the island. With Eggman defeated, Sonic reunited with his friends to Green Hill Zone, where he released the Chaos Emeralds, with their power ensured the island's prosperity.

In Sonic the Hedgehog (8-bit), Dr. Eggman invaded South Island and kidnapped the Animals there. Sonic thus sat off to stop Eggman and was eventually able to defeat Eggman and foil his plans.

In Sonic the Hedgehog 2 (8-bit), Sonic, after having saved South Island, had just returned to the island from a casual adventure when he found a note from Tails. In the note, Tails said that he and the Animals of the island had been kidnapped by Dr. Eggman and were now being held captive in the Crystal Egg. To reach Tails, Sonic had to collect the Chaos Emeralds. The note also warned Sonic of Eggman's six Master Robots, who were waiting for him. With no time to waste, Sonic set off to save Tails.

Along his adventure, Sonic got the Chaos Emeralds as instructed and took out the Robot Masters, before facing Eggman in the Crystal Egg Zone. However, the doctor escaped through a teleporter upon his defeat. With Tails still missing, Sonic almost despaired, but then Tails appeared from the teleporter, unharmed. Though confused at this turn of events, Sonic was happily reunited with Tails and the duo departed for new adventures together.

In Sonic the Hedgehog 2 (16-bit), Sonic was traveling the world in the Tornado in search of adventure, when he discovered West Side Island. Deciding to land there, Sonic began exploring this new region. After a few days, Sonic noticed that someone was following him and saw it was a two-tailed fox cub named Miles "Tails" Prower, who had come to idolize him. As Tails hid upon being discovered, Sonic chose to ignore him and tried running away, but Tails continued to follow him and even kept up with his speed. Impressed by the fox's tenacity and ability to keep up, Sonic decided to let him tag along despite his disinterest in him. Later, during an early afternoon, Sonic was napping under the Tornado when he was awoken by explosions and saw Badniks attacking West Side Island. Standing beside Tails, who was watching him, during the initial attack, Sonic knew that Dr. Eggman was behind this and ran into the center of the attack to find the mad doctor.

It turned out that it was indeed Eggman who was at his old schemes again. This time, he was turning the island residents into Badniks to find the Chaos Emeralds, which were located on the island, to create the Death Egg for conquering the world. Sonic thus set out to stop Eggman, retrieve the Chaos Emeralds, and save the island, with Tails following him all the way. When Sonic obtained all seven of the Chaos Emeralds, he discovered that their powers could turn him into Super Sonic. All the while, Tails proved to be great assistance to Sonic with his unique skills, and the two began forming a strong bond.

After freeing West Side Island, Sonic and Tails followed Eggman to the Wing Fortress Zone on board the Tornado, where Tails and the Tornado were shot down, forcing Sonic to go on alone. When Dr. Eggman escaped in his rocket ship, Sonic found Tails coming to his aid in an rocket-enhanced Tornado. Catching up to the doctor's rocket in the Tornado, Sonic rode the ship to the Death Egg where Sonic fought Eggman's Mecha Sonic, followed by Eggman in the Death Egg Robot. After a heated battle, Eggman was defeated once again, which triggered a chain reaction that made the Death Egg crash, but Sonic escaped by jumping off into space.

Falling through the atmosphere, Sonic was saved by Tails, who had flown into the sky to look for Sonic, and together the two of them flew through the sky. With their adventure at an end, Tails had become Sonic's best friend. Sonic in turn took the fox under his wing as his sidekick, setting the course for their future.

In SegaSonic the Hedgehog, Sonic was captured by Dr. Eggman and imprisoned on Eggman Island where he was to be executed along with Mighty the Armadillo and Ray the Flying Squirrel. Teaming up with Mighty and Ray, Sonic escaped his cell, only to be blown to the other side of the island with Mighty and Ray by a geyser triggered by Eggman. Working together to escape the island, the trio got to Eggman's Tower where they confronted Eggman. Eggman, however, triggered the self-destruction of the tower, with Sonic, Ray and Mighty managing to escape just in time.

In Sonic the Hedgehog CD, some time after the South Island incident, Sonic was traveling to Never Lake to explore the Little Planet, a small satellite that goes near Earth once a year. When Sonic arrived, however, he saw that the entire planet had been transformed into a mechanical wasteland and chained to a nearby mountain. After avoiding some falling mountain debris, Sonic noticed Dr. Eggman's face carved into the mountain where the chain was embedded; immediately he knew that his arch-nemesis was behind this and up to no good again and traveled to the Little Planet to liberate it. As he arrived, Sonic learned he could undo Eggman's work by using Little Planet's time passages to change the past and by collecting the native Time Stones, powerful gems capable of controlling the passage of time which Eggman had his eyes on to conquer the world.

Shortly after his arrival, Sonic met Amy Rose, who had a massive crush on him. Only shortly after their meeting though, Amy was captured by Metal Sonic, a robot created by Eggman to destroy Sonic, leaving Sonic with the task of saving Amy too. Using his unrivaled speed, Sonic ensured a good future for the Little Planet. He eventually caught up to Metal Sonic and the doctor once again, and raced Metal Sonic at Stardust Speedway with Eggman hot on his heels. While Sonic outraced his metallic doppelganger, Metal Sonic was smashed at the finishing line while Sonic saved Amy from captivity.

Sonic went on and defeated the doctor in Metallic Madness, which caused the doctor's bases to collapse. After escaping Little Planet with Amy, Sonic destroyed the chain holding the Little Planet and stood in awe as the Little Planet showed Sonic's face in a shower of light as a sign of gratitude before warping away, leaving many new flowers growing around the area. While Eggman managed to grab a Time Stone, Sonic put an end to his schemes by destroying his escape vehicle.

In Sonic Chaos, Sonic was out on an adventure with Tails when they heard a rumor saying that Dr. Eggman was seeking the Chaos Emeralds on South Island. Returning home, they found the island in chaos as Eggman had stolen one of the Chaos Emeralds, thereby creating an imbalance that scattered the rest of the Chaos Emeralds and was making the island sink into the ocean. As such, Sonic and Tails set out to get the Chaos Emeralds before it was too late.

In the ensuing battles, Sonic and Tails recovered the lost Chaos Emeralds except one. Afterwards, they defeated Eggman in a final showdown and retrieved the Chaos Emerald in his possession, ensuring South Island's safety once more.

In Sonic the Hedgehog 3, many days after stopping the Death Egg, Sonic was napping on the beach while Tails, who had discovered a large reaction of chaos energy out on the sea, was trying to seek him out. At the same time, Sonic found an ancient ring washed on the shore, which made him recall a legend about a floating Island in the sky with a highly unique culture supported by powerful stones. Filled with nostalgia, Sonic ultimately headed out with Tails in the Tornado, to check out the chaos energy reaction, ready for another adventure.

When Sonic and Tails reached the location, they found the legendary floating isle, Angel Island, except that the island was kept at the ocean's surface by the Death Egg, which Sonic thought they had destroyed, which had crash-landed on it. Seeing that the Death Egg was currently being rebuilt, Sonic and Tails set out to destroy the Death Egg for good. Sonic used the Chaos Emeralds to transform into his Super State and stormed the island, but when he arrived, Sonic was ambushed by Knuckles the Echidna, the guardian of the floating island and the Master Emerald, who forced the emeralds out of Sonic. The echidna, who had been tricked by Dr. Eggman into believing that Sonic and Tails had come to steal the Master Emerald, thus stole the Chaos Emeralds and escaped with them to hide them.

Despite this setback, Sonic and Tails left to liberate the island from Dr. Eggman's robots. During their adventure, Sonic and Tails were repeatedly ambushed by Knuckles, but they got through each encounter with their lives and recovered the Chaos Emeralds as well. When reaching the Launch Base Zone, Sonic and Tails boarded the Death Egg just as it took off where they faced Eggman, who had returned to defeat Sonic with excessive force. Nevertheless, Sonic defeated Eggman again, with their resulting battle taking its toll on the Death Egg at a critical point of its launch, making it crash into the Lava Reef Zone.

In Sonic and Knuckles, as Sonic and Tails landed in the Mushroom Hill Zone after escaping the falling Death Egg, they saw the space station survive another crash landing, this time into the island's volcano. Not content unless the Death Egg was completely destroyed, Sonic set out with Tails once more to find the Death Egg and destroy it and as well discover Eggman's fate. As the duo got through Mushroom Hill, they spotted Knuckles passing through a hidden doorway. After making sure Knuckles was gone, Sonic opened the hidden doorway and looked inside it with Tails, where they found a Giant Ring. Enthralled, Sonic touched it, which took him and Tails to the Emerald Shrine in the Hidden Palace Zone where the Master Emerald rested. Riddled with questions, Sonic and Tails returned to Mushroom Hill Zone to began the next phase of their adventure.

Eventually, the duo reached the Hidden Palace Zone on their own, where Sonic faced Knuckles in an epic showdown and won. Sonic and Tails then followed the red echidna as he went to check the Master Emerald, where they saw that Eggman stole it for the purpose of powering the Death Egg. As the doctor escaped with the Master Emerald, Knuckles, having realized Eggman's deceit, befriended Sonic and Tails and guided them to Sky Sanctuary Zone to reach the Death Egg, though they had to leave Knuckles behind as he was too exhausted from the previous struggles. On their way through the sanctuary, Sonic and Tails fought Eggrobo and Mecha Sonic several times, where they in the final encounter used a crumbling pillar to get on the Death Egg.

Onboard the Death Egg, Sonic and Tails faced Dr. Eggman in his Great Eggman Robo for a final showdown. After the defeat of the contraption, causing the final destruction of the Death Egg, Eggman escaped with the Master Emerald in his Final Weapon, but Sonic transformed into Super Sonic and pursued the doctor through space. After a long battle, Sonic beat Eggman's Final Weapon and returned to the world below with the Master Emerald where Tails caught him in the Tornado. The two then brought the Master Emerald back to where it belonged. Having made peace with Knuckles, Sonic and Tails left Angel Island for the time being. Sometime after this though, Sonic rescued Knuckles in the Tornado—after the latter's fight against the recently-reactivated Mecha Sonic—from falling into the ocean. The two brought the stolen Master Emerald back to Angel Island and they parted ways once more.

In Sonic the Hedgehog Triple Trouble, Sonic and Tails caught wind that Dr. Eggman had lost the Chaos Emeralds following a weapons test and sprung into action to find them. While collected information however, Knuckles, who had been deceived by Eggman that they sought the Emeralds for the wrong reasons, suddenly popped up and gave them a warning before leaving. Despite their adversaries, Sonic's resolve remained unshaken.

Along their adventure, Sonic got all but one of the Chaos Emeralds while overcoming both Knuckles and Fang the Sniper, the latter who wanted the Emeralds for profit. When arriving at the Dr. Eggman's base, Sonic and Tails faced and beat Metal Sonic, Fang and finally Eggman for good while retrieving the final Chaos Emerald from the doctor. After that, Sonic and Tails freed Knuckles from imprisoned and made up once more, before talking off on the Tornado towards new adventures.

In Sonic Labyrinth, some days after Tails left on a solo adventure, Sonic awoke from a nap on South Island, but when he slipped his shoes on, he noticed that his feet felt extremely heavy. Upon examination, he noticed Dr. Eggman's insignia on his shoes which proved irremovable. Cursing his carelessness, Sonic noticed Eggman proclaiming to his nemesis that he had switched Sonic's Power Sneakers out with his Speed Down Boots, which disabled Sonic's speed and agility. The only thing that could remove them were the Chaos Emeralds, which Eggman had already hidden away in his new super labyrinth on South Island. Unable to chase after the doctor, Eggman began taking over the island. While his speed was gone however, Sonic realized that he could still use his Spin Dash and resolved to brave this labyrinth to get back both his speed and the Emeralds.

With his Spin Dash, Sonic made his way through the labyrinth, and expelled Eggman from the island while regaining the Chaos Emeralds and his regular shoes.

In Sonic the Fighters, Sonic learned that Dr. Eggman had built the Death Egg II and was deploying armies of robots from it, which were laying waste to everything. Luckily, Tails had built the Lunar Fox, which he could fly directly to the new Death Egg in and destroy it. However, it was a one-seater and it needed all of the Chaos Emeralds to take off. Sonic and Tails therefore set off to gather the Emeralds from their friends, who were safeguarding them, from around the globe. On their first stop however, Sonic got into an argument with Knuckles over who would get to use the Lunar Fox, with Knuckles arguing that only the strongest among them should go. Believing he was more than qualified, Sonic accepted Knuckles' challenge, but before the hedgehog and echidna could fight, Tails got between them and convinced them to fight fair and squarely over the spot in the ring with the other Emerald guardians, and the one who could win against all the contestants got to ride the Lunar Fox. A fighting tournament was subsequently established.

At the end of the tournament, the victor used the Chaos Emeralds to go to the Death Egg II and made it self-destruct moments after escaping it.

In Sonic 3D Blast, Sonic traveled with Tails and Knuckles to Flicky Island. Having heard legends about the island's Flickies' being the key to find the Chaos Emeralds, the trio journeyed to there to find these birds.

Once they arrived on the island, however, they found the island in a pandemonium and Dr. Eggman nearby, busying himself with turning the Flickies into Badniks. It turned out that Eggman had established a base on the island and was trapping the Flickies so they could power his robots and find the Chaos Emeralds on the island. As Sonic made his presence clear to Eggman who departing in the Egg Mobile, Sonic decided to rescue the island and its inhabitants. In no time, Sonic saved the Flickies on the island and, with the help of Tails and Knuckles, gathered all of the Chaos Emeralds before the doctor could do. The Flickies then helped Sonic enter Dr. Eggman's secret lair, where Sonic beat Eggman in a lengthy battle. Escaping the lair in time, Sonic met the Flickies who thanked him for his help and peace reigned over the island once more.

In Sonic Blast, Sonic was napping on South Island when he was awoken by a light from a nearby Chaos Emerald which shattered and spread across the island. Eggman then showed up to reveal he was planning to shoot Sonic with a laser beam, but hit the Chaos Emerald instead. Still pleased with the outcome, Eggman planned to use the shards to fortify his Silver Castle. As Sonic was about to head to find the shards, Knuckles showed up and joined him in his quest. Eventually, Sonic and Knuckles got the shards first and destroyed Eggman's fortress.

In Sonic R, Sonic was on an adventure with Tails when they saw an advertisement of the World Grand Prix, a racing competition to determine the fastest in the world. Despite Tails' urging, Sonic was not interested in participating, but when he glimpsed Dr. Eggman's name on the list of participants, he changed his mind and ran off to register.

In the competition, Sonic had to face many of his friends, new and old enemies and as well Eggman, who planned to use Sonic to locate the Chaos Emeralds which were on the race tracks. In the end, Sonic kept his title as the fastest thing alive while he and the others kept Dr. Eggman from the Chaos Emeralds.

In Sonic Adventure, Sonic was just returning home through Station Square after being gone for a while on a long journey where he saw the Station Square Police Department fighting Chaos. Sonic stepped and defeated Chaos, though it escaped. The next day, Sonic saw Tails' crash in his plane nearby and came to his aid. The fox took Sonic to see a plane he was working on, powered by a Chaos Emerald, but at the workshop Dr. Eggman appeared to take the Emerald. Though the duo beat Eggman and his Egg Hornet, Eggman snatched the Chaos Emerald and revealed Chaos, whom he transformed into Chaos 1 with the Emerald and told his plan to make it invincible with all seven Chaos Emeralds and then build Robotnikland upon Station Square. As Eggman fled, Sonic set out with Tails to get the Chaos Emeralds before Dr. Eggman.

Sonic and Tails soon got two Emeralds, only for Eggman to briefly knock them out with sleeping gas and steal one. Unshaken, Sonic and Tails soon found another Chaos Emerald, when they were attacked by Knuckles, who had been tricked by Eggman into believing Sonic had Master Emerald Shards. Sonic fought Knuckles until he dropped the Chaos Emeralds, which were then taken by Eggman and given to Chaos 2, transforming it into Chaos 4. After Sonic and the others beat it, Eggman escaped to his Egg Carrier. Sonic and Tails tried followed him in the Tornado, but were shot down. Back on the ground, Sonic began looking for Tails, but met Amy who wanted him to her protect a Flickey. Despite Sonic refusing, Amy followed him until they were attacked by ZERO, who soon kidnapped Amy. Sonic followed them as ZERO fled to the Egg Carrier until he reached a dead end, but then met Tails in the Tornado 2 who got them onboard the Egg Carrier. When they found Amy with Eggman however, Sonic was attacked by E-102 Gamma, but before Sonic could destroy Gamma, Amy convinced him to let it go. As the Egg Carrier began to crash, Sonic had Tails get Amy to safety while he followed Eggman.

Eventually, Sonic found Eggman with Chaos 6, just as Big the Cat showed up to save Froggy who was trapped inside Chaos. After saving Froggy, Sonic defeated Chaos 6, but as Eggman escaped, Knuckles showed up, whom Sonic left Chaos to while he followed Eggman. On the way, Sonic found an ancient temple with a mural depicting a monster on the inside and a mysterious light which took him back in time to see the Altar of the Emeralds in ruins and Tikal trying to stop a catastrophe. Back in the present, Sonic found Eggman and beat him for good before reuniting with Tails again.

While trying to rest, Sonic had to head out when Tails reported that Angel Island had fallen. There, they found both Knuckles and Eggman, and learned that Chaos was still alive, had rebelled against Eggman to destroy the world, and possessed six Chaos Emeralds. As they were heading out get the last Emerald before Chaos, Sonic was drawn into the past again, where he saw the Knuckles Clan's attack on the altar and Tikal sealing herself and Chaos inside the Master Emerald. Back in the present, Sonic and Tails found the Chaos Emerald in the Tornado 2, but lost it to Chaos, who became Perfect Chaos and attacked Station Square. As Perfect Chaos destroyed the Egg Carrier 2, Tikal came to Sonic to explain that Chaos was blinded by wrath. After Perfect Chaos released the drained Chaos Emeralds, Tikal wanted to seal Chaos again, but Sonic said it would not work as Chaos would still be full of rage. Sonic's friends then came with the Chaos Emeralds, claiming that he could still use their positive energy. Transforming into Super Sonic, Sonic defeated Perfect Chaos while neutralizing its anger. As Chaos and Tikal departed, Sonic noticed Eggman making his escape and decided to head off himself for his next adventure.

In Sonic the Hedgehog Pocket Adventure, Sonic discovered Dr. Eggman was up to his old tricks again by capturing Animals, and set out to foil him. While chasing Eggman, Sonic had several confrontations with the doctor, who managed to give Sonic the slip each time. Eventually though, Sonic came across Knuckles, who suddenly attacked him. Upon defeating Knuckles and claiming his Chaos Emerald however, Eggman ambushed the two heroes. Taking the Emerald, Eggman left Sonic and Knuckles to get crushed by the collapsing cave they were in. With his last strength however, Knuckles sent Sonic out of the cave and into the sky with an uppercut.

Among the clouds, Sonic landed on the wings of the passing Tornado, flown by Tails. With Tails' aid, Sonic reached Eggman's air base and resumed his hunt for Eggman. There, Sonic had a rematch with Mecha Sonic, who went haywire upon its defeat and revealed an entrance into the next Zone where Eggman was hiding. There, Sonic found Eggman, only for the doctor to use a trap he had set for Sonic to drop him into the depths of his base. However, Sonic soon caught up to Eggman and surprised the doctor, who tried fighting back using another one of his creations. However, Sonic still defeated Eggman and chased him to Last Utopia Zone. There, Eggman appeared before Sonic in a mech powered by the Chaos Emerald he stole from Knuckles. However, Sonic took back the Emerald and defeated the mech. Eggman then tried to escape into space. In response, Sonic, having gathered all the Chaos Emeralds at this point, transformed into Super Sonic and chased after Eggman. In the depths of space, Sonic defeated Eggman when he tried using his last mech against him, and returned to Earth where he reunited with Tails onboard the Tornado, just before the Chaos Emeralds scattered themselves. With peace restored to the world, Sonic headed out on new adventures with Tails.

In Sonic Shuffle, Sonic, Tails, Knuckles and Amy were suddenly transported to the Temple of Light in Maginaryworld. There, they met Lumina Flowlight who had brought them here to help her restore the Perfect Precioustone which had been shattered by Void and caused its guardian, Illumina, to disappear. With Maginaryworld endangered by Void without the Precioustone, Sonic and his team promised to help. While recovering the Precioustone pieces and restoring the worlds affected by Void, Sonic occasionally had dreams where he met Void. While initially defying Void, Sonic and his friends noticed he was lonely and sad which touched their hearts, and they soon realized that Void and Lumina were two halves of the same being.

After returning all the Precioustones to the Temple of Light, Sonic and the group headed there to stop Void when he sought the Perfect Precioustone again. There, Void succumbed to his despair and became a monster. Though Sonic and his team defeated Void, Lumina lost hope as the Perfect Precioustone was not recovering. As Sonic found Void in the form of a dark gem, Sonic helped cheer Lumina up by telling her that she should not reject Void as the negative feelings that he embodies makes it possible for people to dream. Sonic then gave Void to Lumina and witnessed her restoring the Perfect Precioustone, and Lumina and Void returning to their original form, Illumina. With Maginaryworld restored to an even better place, Sonic and the gang received Illumina's gratitude before returning home.

In Sonic Adventure 2, Sonic was on his own when he met the Guardian Units of Nations who arrested him for robbing a federal reserve bank of a Chaos Emerald. Handcuffed, Sonic was brought onboard a helicopter, but he managed to escape while over Central City. Soon after, Sonic encountered Shadow the Hedgehog, the true thief of the Chaos Emerald. Realizing that he had been mistaken for him, Sonic attacked Shadow, but Shadow used Chaos Control to escape. No sooner, Sonic was cornered and arrested by G.U.N. and locked up on Prison Island. The following day though, Sonic found Amy at his cell, who had come with Tails to break him out. While freeing Sonic, Amy revealed Shadow was on the island and Dr. Eggman was behind it all. With this information, Sonic left to find Shadow. When he did, Sonic fought Shadow until he heard that the island was about to explode on Eggman's radio. Sonic, however, found Tails and Amy and escaped the island before it exploded.

Back in Central City, Sonic, Tails and Amy saw Eggman's broadcast, where he revealed the Eclipse Cannon, powered by six Chaos Emeralds, on the Space Colony ARK. After demonstrating the Eclispe Cannon blowing up half of the Moon, Eggman demanded world control within 24 hours or he would fire at earth. Their new target now Eggman, Sonic distracted the police as they arrived to give Tails time to track Eggman. He soon contacted Tails and heard they could use the communication link to Eggman in the President's limousine to find him. Meeting up inside the limo, Sonic and Tails learned Eggman was on the Space Colony ARK.

With Knuckles' help, Sonic, Tails and Amy found Eggman's base where they hoped to find a space ship to the ARK so they could destroy the Eclipse Cannon. After infiltrating the base, where Sonic enlisted Knuckles to find the keys to the center, they were ambushed by Eggman and his Egg Golem. However, Sonic defeated the robot and joined the others in a space shuttle. While en route to Space Colony ARK, Knuckles tried to take control of the shuttle when a stray asteroid force-open the cargo bay and released his Emerald Shards, causing Sonic and the others to crash land on the ARK. Onboard, Sonic got a fake Emerald from Tails that he could use to destroy the Eclipse Cannon from the inside out when Tails turned off the power. When Sonic reached the control room, however, he was contacted by Dr. Eggman, who demanded the final Chaos Emerald or he would kill Amy.

Meeting with Eggman, Sonic thought he could trick him into taking the fake Emerald. Eggman, however, saw through this and Sonic was captured in a capsule set to explode and ejected into space after saying goodbye to his friends. Before the capsule could explode, however, Sonic used Chaos Control with the fake Emerald to warp himself back to the ARK. There, Sonic got Knuckles to find Tails and Amy while he went to the cannon to destroy it with the fake Emerald. On his way there, Sonic met Shadow and fought him once more. After Sonic won, he destroyed the Eclipse Cannon just before it fired.

Back onboard, Sonic and Knuckles met Rouge, who revealed the ARK was now on a collision course towards earth. There, Sonic and all the others saw a recording of Gerald Robotnik announcing to the world that the ARK would crash into the planet and destroy it as his revenge at humanity for the death of his granddaughter, Maria. Banding together with Eggman, Sonic and the group came up with plan of using the Master Emerald to deactivate the cannon's core, which was powered by the seven Chaos Emeralds, to stop the Space Colony's crash course.

When Sonic and Knuckles reached the core, they were intercepted by the Biolizard, but Shadow appeared, now on their side, and held it off, while they deactivated the Chaos Emeralds. In response, the Biolizard warped outside the ARK and became the Finalhazard to keep the ARK on its collision course. Determined to stop it, Sonic and Shadow used the Chaos Emeralds to become Super Sonic and Super Shadow, and they defeated the Finalhazard before sending the ARK back into orbit with Chaos Control. Back onboard, Sonic informed the others that Shadow had seemingly died after stopping the ARK, before giving Shadow's Inhibitor Ring to Rouge and assuring her that Shadow was a great hero. After processing Shadow's death, Sonic suggested that they all went home and he bid farewell to his worthy rival.

In Sonic Advance, Sonic joined forces with Tails, Knuckles and Amy to stop Dr. Eggman from obtaining the seven Chaos Emeralds. Over the course of their adventure, Sonic and his friends got the Chaos Emeralds first and followed Eggman to the X-Zone. After they defeated the EGG X, Sonic chased after Eggman. When Eggman fled to the Moon though, Sonic used the Chaos Emeralds to become Super Sonic and pursued the doctor. On the moon's surface, Super Sonic defeated Eggman and his Super Egg Robo. After the fight, Super Sonic seemingly disappeared, only to reappear in the sky a few days later where he met Tails in the Tornado.

In Sonic Advance 2, Sonic learned that Dr. Eggman kidnapped Tails and Knuckles when he tried again to build the Eggman Empire. As such, Sonic headed out to save his friends. Along the way, Sonic met Cream the Rabbit and Cheese, who where held hostage by Dr. Eggman. After saving Cream and Cheese from Eggman, Sonic tried to leave them, but the duo followed him as Cream wanted to save her mother, Vanilla, who was held captive by Eggman too.

Following that, Sonic rescued Tails and Knuckles from Eggman who also joined him on his adventure. After hunting down and seemingly defeating Eggman, Sonic and the others found Vanilla, only to have her kidnapped by Eggman in his new mech. Seeing Cream cry at the loss of her mother, Sonic transformed into Super Sonic and both defeated Eggman and saved Vanilla.

As they fell through the atmosphere, Super Sonic tried to break the fall of the capsule containing Vanilla, but the re-entry tore the capsule apart and Super Sonic powered down to normal. However, Sonic caught Vanilla and brought her safely back down to the ground. There, Sonic reunited Cream and her mother and he thanked Tails and Knuckles for their help before running off again, looking for new adventures.

In Sonic Advance 3, while hanging out with Tails, Sonic witnessed Dr. Eggman splitting Earth into seven regions with Chaos Control so he could turn each region into a part of the Eggman Empire. Sonic thus set out with Tails to restore the world and collect the Chaos Emeralds before Eggman could.

During their adventure, Sonic and Tails found Knuckles, Amy and Cream who joined them. Along the way, Sonic also faced Dr. Eggman's newest creation, G-merl, a rebuilt version of Emerl. After securing the seven Chaos Emeralds, Sonic and his friends made it to the Emerald Altar where they beat the Hyper EggRobo and used the Master Emerald to return the world to normal. Sonic then followed Eggman and G-merl, until G-merl betrayed Eggman, took the seven Chaos Emeralds from Sonic and transformed into Ultimate G-merl. Sonic, however, took the discarded Chaos Emeralds and transformed into Super Sonic. Putting aside their differences to fight a common enemy, Super Sonic and Eggman joined forces and defeated Ultimate G-merl.

With Ultimate G-merl's defeat, Sonic passed out in the following explosion, but woke up back home and found himself surrounded by his friends who had awaited his return. After seeing Eggman leaving, Sonic then headed out himself, searching for new adventures.

In Sonic Battle, Sonic found a Gizoid robot during a stroll at Emerald Beach. As he examined it, Sonic displayed some fighting moves upon its request, forming a Link with it. Sonic decided to take it to Tails to get it examined, but ran into Shadow, who demanded the Gizoid. Sonic refused and beat him in battle. After Shadow told Sonic to keep the Gizoid from Eggman and left, Sonic presented Tails with the Gizoid, but then saw Rouge on the beach and went to question her. Rouge told Sonic she and the government were after the Gizoid too, but Sonic got her to leave after fighting her. When returning to Tails' Lab, Sonic encountered and defeated an E-121 Phi before finding Tails unharmed, much to his relief. Tails revealed that the Gizoid evolved with each Chaos Emerald inserted into it and that it could copy fighting moves. Thrilled, Sonic decided to train it.

After some training, Sonic named the Gizoid "Emerl", and they and Tails decided to see if Knuckles had a Chaos Emerald to help Emerl evolve. On the way, they faced an E-121 Phi and Chaos Gamma, but defeated both. When they got there, however, Knuckles mistook Emerl for an E-121 Phi and attacked him. After Emerl beat Knuckles, Sonic and Tails explained everything and got Knuckles' Chaos Emerald which they gave to Emerl.

Sonic continued training Emerl, until Tails decided to take Emerl to Central City for examination. When they returned, Sonic heard from Tails and Rouge that Emerl was a weapon of mass destruction, but Sonic refused to believe it and suggested they could reprogram Emerl, and Rouge revealed that they could reset Emerl by inserting all seven Chaos Emeralds into him and giving him an unknown keyword. While wary of Rouge's motives, Sonic nevertheless introduced her to Emerl, but then Rouge left. Knuckles then arrived and Sonic told what had happen before he and Emerl began to tease him, which let to a fight between the three of them.

From there, Sonic continued Emerl's training until he saw Amy coming and ran away, only to learn when he returned that Rouge had stolen Emerl. Sonic later found Emerl with Rouge and engaged her in battle with Tails and Knuckles' aid and eventually made Rouge surrendered Emerl. Later on, Sonic left Emerl with Tails for a while and when he returned, he heard from Emerl that Knuckles had been tricked by Eggman during his absence. Soon after, Sonic and Emerl met Amy again, who viewed Emerl as hers and Sonic's "baby". As Sonic was berated by Amy for his parenting, he ran off when Emerl made a bad choice of words. He later returned and was told by Amy that he had to marry her now since she had helped raising Emerl, but Sonic fled after tricking Amy to close her eyes.

Sonic and Tails later left Emerl in Amy's and Cream's care, when they checked out a lead on a Chaos Emerald, which turned out to be fake. Later, Sonic was contacted by Eggman who claimed he held Cream and Emerl hostage, but he did not believe him when he could not prove it. He later saw Eggman captured in his own "spiky rodent trap" by Emerl and Cream on-screen, and headed out to pick them up.

Sonic later met Shadow again and thought he want to capture Emerl, but heard that it was not his intention. Shadow informed Sonic that Emerl only needed one more Chaos Emerald to awake his full power, which would destroy the world, but Sonic believed Emerl would not do that since he had a heart like Shadow, who was also a top secret ultimate weapon. As Shadow brushed off his arguments, Sonic gave up trying to convince Shadow and let him have Emerl. Despite Emerl being attracted to Shadow's Chaos Emerald, Sonic let Emerl go with Shadow, believing he would learn who he really was with his help. When Emerl then came to fight Shadow after having reset to a good robot, Sonic teamed up with Shadow to test Emerl's abilities to the fullest. After the fight, Sonic saw that Emerl no longer needed him and told him to live his life on his own, though he noted his punches could use some work.

Later on, Sonic and Emerl met Eggman, who announced that he would use his Final Egg Blaster on his newest Death Egg to conquer the world before escaping. Sonic and Emerl then met up with Tails, who had brought a transporter to the Death Egg with him. There, Sonic chose Emerl to stop Eggman since the transporter could only send one person at the time.

When Emerl left for the Death Egg, Sonic and his friends watched Emerl through a monitor on the Death Egg. After Emerl defeated Eggman however, the doctor fired the Final Egg Blaster and destroyed some stars, causing Emerl to revert back to his original programming. However, Eggman was unable to control Emerl as expected, and Emerl prepared to fire the Final Egg Blaster at Earth. As The Master Emerald then appeared, Sonic went to the Death Egg with it, hoping to neutralize Emerl's power, but Emerl smashed the Master Emerald. Tails then told Sonic that he could stop Emerl by damaging him, but it would destroy him. With a heavy heart, Sonic engaged Emerl in battle and defeated him with his full strength.

As Emerl began to say farewell, Sonic, in a rare chase of emotional denial, tried to assure Emerl that everything would be fine, only for Emerl to disappear in a flash. Back home, Sonic tried to comfort his friends over Emerl's death and was positive they would see Emerl again one day.

In Sonic Heroes, Sonic was running around on his own world tour when he met Tails and Knuckles in the Tornado 2, who gave him a letter from Dr. Eggman. In the letter, Eggman claimed to have created "the ultimate weapon" to conquer the world with and that he challenged them to stop him within three days. Confident as ever, Sonic took off to stop Eggman with Tails and Knuckles right behind him, officially forming Team Sonic.

Team Sonic began their mission by tracking down Dr. Eggman to Ocean Palace. There, they defeated his Egg Hawk, but Eggman escaped. After that, Team Sonic tracked Eggman to Grand Metropolis. After liberating the city from Eggman's control, and escaping the Power Plant, Team Sonic came across Team Rose, who began fighting them. However, Sonic used the fight as a distraction to escape Amy.

Team Sonic then arrived in Casino Park. After passing through the city, Team Sonic was attacked by Eggman's robot hordes, which they defeated. As they chased Eggman to Rail Canyon and only having until sunset, Sonic and his team reached Bullet Station and destroying Eggman's local base. There, the team found Eggman in the Egg Albatross and defeated him. However, Team Sonic then discovered that the Eggman they had been chasing was a fake and that their challenge letter was to distract them while Eggman launched his Egg Fleet. Enraged, Sonic ran off in pursuit of Eggman.

Resuming their chase after Eggman through the jungle, Team Sonic encountered Team Dark. Amazed to see Shadow was still alive, Sonic and his team fought Team Dark to decide who went after Eggman. After the battle, Sonic saw Eggman and Shadow head towards Hang Castle and lead his team that way. After infiltrating the castle and escaping Mystic Mansion, Team Sonic was attacked by Eggman's robot hordes, but they quickly beat them.

After that, Team Sonic got to the Egg Fleet, where they traveled across the flagships to the Final Fortress and destroyed the flagship's core. Afterwards, Team Sonic found Dr. Eggman in his Egg Emperor and defeated him. After heavily destroying the Egg Fleet, Sonic was teased by Knuckles on how he would not have done this on his own, but surprised Knuckles by agreeing and thanked both him and Tails for their help. No sooner though, Amy came running and Sonic tried to escape.

Some time later, Team Sonic and the other teams witnessed the return of Metal Sonic, who had been staging the teams' adventures and impersonating Eggman so he could follow them and copy their data for a plan to conquer the world himself, as he transformed into Metal Madness. Seeing that the teams had all the Chaos Emeralds, the real Dr. Eggman came up with the plan of using them against Metal Sonic. Though their chances of winning were slim, Sonic volunteered to go up against Metal Sonic alone, but was joined by Knuckles and Tails while the other teams volunteered to buy them some time. Accepting everyone's help, Sonic and his team got the Chaos Emeralds ready while Team Rose, Dark and Chaotix fought Metal Madness.

As Metal Madness became into Metal Overlord, Sonic transformed into Super Sonic, whilst granting Tails and Knuckles their own Super States. The team then took off and defeated Metal Overlord. Back on the flagship, Sonic stood triumphant over Metal Sonic, until he saw Amy coming. Sonic then told Metal Sonic that he would be ready for a rematch anytime and left with Tails. Soon after, Sonic reunited with Knuckles, and he headed out with his team to find their next adventure.

In Shadow the Hedgehog, Sonic worked with most of his friends and G.U.N.'s forces to repel the Black Arms' invasion of Earth. He often appeared during Shadow's Hero Missions, helping Shadow fight the Black Arms and their leader, Black Doom.

While fighting the Black Arms in Westopolis, Sonic came across Shadow, who was looking for the Chaos Emeralds, and asked for his help in taking out the enemy.

In the Hero scenario, where Shadow accepted Sonic's request, Sonic tried to chat with Shadow after completing their objective and suggest a friendly face-off, but was declined. After Doom's Eye arrived and told them where the next Chaos Emerald was, Sonic ran off to its location with Shadow.

Having arrived at Lethal Highway before Shadow, Sonic found the Black Tank containing the Chaos Emerald the Black Arms had taken. As Sonic chased after the Black Tank, he met up with Shadow and asked for his assistance.

In the Hero scenario where Shadow agreed to help Sonic, the two destroyed the Black Tank before it could escape Westopolis. However, as they tried to collect the Chaos Emerald, Sonic and Shadow were confronted by Doom's Eye, who summoned the Black Bull to stop them. Nevertheless, Sonic and Shadow defeated the Black Bull and claimed the Chaos Emerald.

In the Hero scenario of Mad Matrix and Death Ruins, Sonic had learned the Black Arms were heading out to the Space Colony ARK, and decided to follow them. With a spacecraft provided by Tails, Sonic went on his way to the ARK alone. While passing through Iron Jungle, however, Sonic came across Shadow and invited him to come with him. Shadow accepted Sonic's offer and the two of them took off.

In the Hero scenario of Sky Troops, Sonic had learned the Black Arms were heading out to the Space Colony ARK, and decided to follow them there. Using a spacecraft from Tails, Sonic headed for the ARK alone. While passing through Iron Jungle, however, Sonic came across Shadow and invited him to come with him to the ARK. Shadow accepted Sonic's offer and the two of them took off.

As Sonic and Shadow approached the ARK in their spacecraft, the Black Arms' forces were waiting for them en masse. Excited about the challenge, Sonic hurried out to engage the enemies with Shadow.

When Sonic and Shadow made it to the Space Colony ARK as they followed the Black Arms, Sonic saw that they were in familiar surroundings, and tried to make Shadow recall the time they race each other there. Sonic then challenged Shadow to a race through Space Gadget to the Chaos Emerald on board the ARK.

In the Hero scenario, where Shadow accept the challenge, Sonic was beaten in the race and Shadow claimed the Chaos Emerald. As the two make their way through the ARK, Sonic and Shadow caught a glimpse of the Black Comet. When Shadow asked what it was, Sonic realized that Shadow suspected the Black Comet was connected to the Black Arms. As Shadow suddenly sensed the Black Arms on the Black Comet, Sonic and Shadow decided to head there.

In the Hero scenario of Lost Impact, Sonic made it on board the Space Colony ARK with Shadow as they followed the Black Arms. As the two make their way through the ARK, Sonic and Shadow caught a glimpse of the Black Comet. When Shadow asked what it was, Sonic realized that Shadow suspected the Black Comet was connected to the Black Arms. As Shadow suddenly sensed the Black Arms on the Black Comet, Sonic and Shadow decided to head there.

After traveling from Space Colony ARK to the Black Comet, Sonic and Shadow made their way to the Final Haunt on the Black Comet, planning to stop Black Doom and the alien invasion of Earth.

In the Hero scenario, Sonic and Shadow began hunting for Black Doom. After obtaining another Chaos Emerald within Black Doom's inner sanctum, Sonic and Shadow finally found Black Doom and defeated him. As Shadow took the final Chaos Emerald from Black Doom, Sonic stood by Shadow's side, as Shadow pronounced he would use the Emeralds to stop the Black Arms and protect the earth.

In the Dark scenario, Sonic was betrayed by Shadow when he abandoned their original goal and began aiding the Black Arms with sealing off Black Doom's inner sanctum. In the last minute, Sonic encountered the Commander in the Diablon, and teamed up with him to stop Shadow. When they found Shadow, Sonic was confused why Shadow sided with the Black Arms, but was amused to hear he did so just to get the opportunity to prove his superiority to him. However, Sonic and the G.U.N. Commander were utterly defeated, and Shadow took the final Chaos Emerald from them. Sonic then commended Shadow for his nerve to do this, before Shadow announced he was now the most powerful hedgehog in the world.

In the Dark scenario of Black Comet, as Shadow was decimating G.U.N.'s forces on behalf of the Black Arms, Sonic teamed up with the Commander in the Diablon to stop Shadow. When they found Shadow, Sonic refused to let him do this, but he and the Commander were utterly defeated by Shadow, who took the final Chaos Emerald from them. As Sonic questioned Shadow why he sided with the Black Arms, Shadow proclaimed himself as the servant of Black Doom.

In the Dark scenario of GUN Fortress, as Shadow ravaged through the GUN Fortress on behalf of the Black Arms, Sonic teamed up with the Commander in the Diablon to stop Shadow. When they found Shadow, Sonic refused to let him do this, but he and the Commander were utterly defeated by Shadow, who took the final Chaos Emerald from them. As Sonic asked Shadow what he planned to do with the Emeralds, Shadow claimed he would use them to destroy the Earth.

In the last story, Sonic arrived with Tails, Knuckles, Amy, Rouge and Dr. Eggman to stop Shadow from giving Black Doom the Chaos Emeralds. Black Doom however, took the Emeralds and used an enhanced Chaos Control to transport the Black Comet to the surface, intending to use humans as energy sources for the Black Arms. Before Sonic could act, he and the others were paralyzed by a nerve gas and Black Doom unleashed the Death leeches on them. Shadow however, was immune to the gas and as he left to stop Black Doom, Sonic told him that he was their only hope left.

Sonic and the others eventually escaped the Black Comet and found some shelter from where they cheered Super Shadow on as he defeated Devil Doom. He then witnessed Super Shadow sending the Black Comet back into space and destroying it with the Eclipse Cannon. Impressed by Shadow's victory, Sonic joined the others for a laugh as an enraged Knuckles chased Eggman around.

In Sonic Rush, Sonic came across Dr. Eggman, who claimed that he would soon possess "the ultimate power". After defeating Eggman, Sonic saw that he dropped a Sol Emerald, but then suddenly he met Blaze the Cat, who took the emerald and left. Sonic later met up with Tails and explained about what had happened. Excited by this challenge, Sonic left with Tails to stop Eggman's newest scheme.

At Water Palace, Sonic first encountered Dr. Eggman Nega, a new foe that had teamed up with Dr. Eggman. After defeating him, Sonic and Tails headed to Tails' workshop, where they learned that there was a rift in the space-time continuum that threatened reality itself. While Tails suspected Eggman Nega may be involved in this, Sonic thought that Blaze might also be a part of this. While fighting Nega and searching for info, Sonic and Tails met Vanilla and learned from her that Cream was with Blaze. Once Vanilla told where to find them, Sonic took off to get answers from Blaze.

During their search, Sonic and Tails came to a path closed by rocks from where Knuckles emerged. Sonic and Tails then heard from Knuckles that he got trapped under the rocks when chasing Blaze. As Knuckles smashed some rocks in fury, Sonic and Tails continued through the path he had cleared. Soon after, they found Blaze and Cream, and Sonic asked Blaze about Eggman Nega, but Blaze noted she would deal with Eggman Nega and the crisis alone. Sonic tried to tell her they should work together, but Blaze declined and left with Cream, forcing Sonic and Tails to follow them. Along the way, Sonic and Tails ran into Amy, who provided them with directions to where Blaze went when they asked.

Eventually, Sonic tracked Blaze to Dead Line where they faced both Eggmans. While Sonic insisted on helping, Blaze refused and tried to force him to leave by fighting him, a fight Sonic tried to stop. As their fight ended in a draw, Sonic saw that Blaze was still willing to manage the crisis and he understood her rough past. Sonic then told her not to handle too much on her own and be true to herself, making Blaze realize she could rely on others, and the two became friends.

With Blaze on their side, Sonic learned that the space-time rift was because her world and Sonic's world were merging with one another due to the Sol Emeralds having been stolen and brought to Sonic's world. Hearing that Eggman and Eggman Nega were to blame, Sonic decided to confront Eggman Nega on Blaze's behalf, since she was not in shape to fight. Just before Sonic could leave, however, they noticed Cream was gone and found a letter left by Dr. Eggman that said he held Cream hostage and that Blaze had to come to Point W alone. Sonic suggested that they gathered help, but Blaze insisted on going alone because Cream was her friend, which Sonic allowed. While Tails doubted this, Sonic assured him by saying that believing in someone was a part of friendship. Sonic himself then faced and defeated Eggman Nega. After the fight, Sonic was welcomed back by his friends, but ran off when he saw Amy coming.

Having collected all the Chaos Emeralds, Sonic came to Blaze's aid when Eggman and Eggman Nega's Egg Salamander drained her Sol Emeralds' power. As the doctors left to prepare for the coming fight, Sonic encouraged Blaze as she despaired, and, with his friends backing Blaze up, he assured her that the Sol Emeralds would never lose their power due to the friendships she has made. This caused the Sol Emeralds to recharge. Sonic and Blaze then used their Emeralds to become Super Sonic and Burning Blaze and together they defeated the Eggmans. As the space-time continuum began to restore itself, Sonic promised Blaze they would meet again as she planned to head home. The two of them then shook hands as the space-time continuum pulled them apart and returned them to their own worlds. Back home, Sonic found Cream, who was sad over Blaze's departure, but cheered her up by telling her Blaze would be back.

In Sonic Rush Adventure, Sonic and Tails were out investigating an unknown energy reaction in the Tornado, but got caught in a storm and sucked into a hurricane. Washing ashore on Southern Island, Sonic and Tails met Marine the Raccoon and they decided to explore the surrounding islands in this unknown territory. The next day, Sonic and Tails found Marine accidentally destroying her SS Marine that she was building. The duo then helped Marine build a new vessel, with Sonic providing the Materials, and the trio began exploring the surrounding islands.

On their journey, the group was attacked by several robotic enemies. Sonic also encountered Johnny, who became his rival in waterbike racing. When arriving at Coral Cave, Sonic met Captain Whisker and his crew, who were the ones behind the attacks. Suddenly, Sonic saw to his surprise Blaze the Cat attack Whisker. Though confused at Blaze's arrival, Sonic teamed up with her to fight the Ghost Kraken. After the fight, the pirates escaped with the Jeweled Scepter, an artifact hidden in Coral Cave which Blaze tried to protect. As Sonic wondered why Blaze was here and not in her own world, he and Tails realized they had been transported to Blaze's world during the storm. After explaining their story, Sonic suggested to Blaze they worked together to get the scepter back which posed a threat to their worlds and she accepted it.

From there, Sonic and the group traveled the sea in their search for clues to the pirates' whereabouts. After having tracked and lost the pirates at Haunted Ship, freeing the Vikings on Blizzard Peaks from the pirates' captivity and uncovering the secrets of Sky Babylon, the group found the pirates' hideout in some ancient ruins. Before heading there however, Sonic, Tails, and Blaze decided to make Marine stay behind as she could endanger the mission. While Sonic and Tails tried to be gentle about it, they silently agreed with Blaze when she told Marine she was a nuisance, making her run off crying.

At the pirates' hideout, Sonic faced Whisker and Johnny alongside Blaze. Despite beating them, however, Whisker escaped and Sonic and his friends saw Marine arriving and going after the pirates, only to get caught by the Ghost Titan. Fortunately, Sonic came up with a plan to distract Whisker by letting Tails pretend the scepter was somewhere else while he and Blaze saved Marine. Sonic and Blaze then destroyed the Ghost Titan together and escaped, while the pirates went down with their ship. Seeing Marine had reclaimed the Jeweled Scepter, the group headed back to Southern Island.

After collecting all seven Chaos Emeralds and Sol Emeralds, Sonic and Tails planned to return home, but learned that the Jeweled Scepter had been stolen again. In the wake of an earthquake, the thieves revealed themselves to be Dr. Eggman and Dr. Eggman Nega in the Egg Wizard, who were behind the pirates, so they could use the Jeweled Scepter's incredible power to build Eggmanland upon both worlds. As Sonic and the gang pursued the Eggmans to Deep Core, the villains tapped into the Power of the Stars with the scepter, but Sonic and Blaze used the Emeralds to become Super Sonic and Burning Blaze. As they were about to defeat the Egg Wizard, however, Eggman Nega tried to destroy them and the world, but Marine distracted them, allowing Sonic and Blaze to destroy the Egg Wizard.

The next morning, Tails constructed a vessel for him and Sonic to return home in. Just before Sonic could leave, Blaze suggested that the Sol Emeralds and the Chaos Emeralds were responsible for their reunion, which Sonic remarked that they could never know for sure, before he shook hands with Blaze once more. As Sonic and Tails were taking off, Marine arrived in her SS Super-Marine to say goodbye. Sonic and Tails then promised Marine they would see each other again and headed back to their own world.

In Sonic Riders, Team Sonic arrived at Future City to search for a Chaos Emerald, when they saw the Babylon Rogues. Tails read on his radar that they had the Emerald and Sonic ran off to intercept them. After Knuckles knocked Storm off his Type-S, Sonic chased after Jet on the Type-S, but was blown off the Extreme Gear by Jet and the Babylon Rogues escaped. Regardless, Sonic was excited to have found new competition.

The next day, Team Sonic saw Dr. Eggman announcing the EX World Grand Prix and that the entry fee for the contestants was a Chaos Emerald, with the winner getting to claim all seven. Sonic was initially suspicious, but when he saw that the participants Dr. Eggman had found were the Babylon Rogues, he decided to enter the competition.

After the qualifications rounds, Sonic was with his team when he met Amy, who also signed up for the tournament, much to his discomfort. After hearing Tails' explanation about the legends of the Babylon Rogues and Babylon Garden, the group met Wave the Swallow who mocked Tails' Blue Star, leaving Sonic annoyed by her behavior. No sooner though, Sonic and the other hurried to next race.

As Sonic made it to the semifinals, he took time off to practice his Extreme Gear skill with his team when they were interrupted by Jet, who mocked Sonic before leaving. While angered, Sonic did not believe he should underestimate Jet. Tails then began to doubt the Blue Star he had made for Sonic, but Sonic told him not to worry.

When Sonic and his team got to the finals, Sonic vowed to a taunting Jet that he would not to lose. When Sonic was about to win the race, Wave detonated the bomb under Sonic's Blue Star, causing him to lose to Jet, much to Sonic's anger. Sonic and the others the saw Jet claim and use the seven Chaos Emeralds in tandem with the Key to Babylon Garden to reveal Babylon Garden itself, with the intention of claiming its treasure. Eggman, however, stole the key so that he could take the treasure for himself, believing it to be technology that he could use to conquer the world. Calling his team, Sonic headed out to stop Eggman. Using the Tornado 2, Team Sonic arrived at Babylon Garden, where Sonic received the Blue Star II from Tails and went after Eggman on it. On the way however, he was pitted again Jet, who was after Eggman too, and Sonic raced against Jet to Eggman as a rematch.

Sonic eventually beat Jet and cornered Dr. Eggman, but stopped when Eggman showed that he held Amy hostage. Sonic, however, dived into Eggman and blew them away when Eggman looked away. Sonic then took back the Key to Babylon Garden and handed it back to the Rouges despite Jet's refusal. As the Rogues went to claim the treasure, Sonic decided to leave, but Amy, furious at him for endangering her, chased after him with her Piko Piko Hammer. No sooner, Sonic and the others heard a roar from inside Babylon Garden and went to check it out. There, they saw the Babylon Rogues had awoken the Babylon Guardian and were forced to fight it. After beating the guardian, Sonic, Jet and the rest found the Treasure of Babylon, which turned out to be a Magic Carpet, much to the disappointment of Eggman. With the whole ordeal over and with their rivalry more friendly, Sonic promised Jet that he would be ready to race him again the next time they met before taking his leave with his friends.

In Sonic Spinball (8-bit), Sonic discovered that Dr. Eggman had established a super-efficient robot factory called the Veg-O-Fortress inside a island volcano, and that Eggman had already taken thousands of Animals there be transformed into robots. Having Tails provide him with a lift to the Veg-O-Fortress in their plane. Sonic dropped into the depths of the Veg-O-Fortress from the sky. From there, Sonic infiltrated Eggman's vast and deadly Pinball Defense System. In no time at all, Sonic managed to swipe the Chaos Emeraldsthat kept the fortress stable and free the captive Animals. After then making it to the top of the fortress, Eggman tried to escape in spaceship, but Sonic managed to reach the doctor and defeat him, resulting in the spaceship's destruction. As Sonic and Eggman fell down from space, Eggman ended up falling into his Veg-O-Fortress, which resulted in the entire volcanic island sinking into the sea.

In the game, Sonic is the only playable character. In the levels, he acts like a pinball controlled by the player, although he still has free movement abilities and can perform the Spin Jump and Spin Dash.

In Knuckles' Chaotix, after Knuckles, Mighty and Team Chaotix defeated Dr. Eggman and Metal Sonic Kai on Newtrogic High Zone, Sonic and Tailswould fly by them in the Tornado.

In Tails Adventure, Sonic makes a cameo as an item the player can collect in Caron Forest. Equipping it allows Tails to use the Spin Dash.

In Sonic the Hedgehog Pocket Adventure, Sonic discovered that Dr. Eggman was up to his old tricks again by capturing Animals, and set out to foil him. While chasing his nemesis, he had several confrontations with the doctor, who managed to give the hedgehog the slip each time. Eventually though, Sonic came across Knuckles, who suddenly attacked him. Upon defeating the echidna and claiming his Chaos Emerald however, Eggman ambushed the duo. Taking the Emerald, the doctor left the heroes to get crushed by the collapsing cave they were in. With his last strength though, Knuckles sent Sonic out of the cave and into the sky with an uppercut.

Among the clouds, Sonic landed on the wings of the passing Tornado, flown by Tails. With the fox's aid, the hedgehog reached Eggman's air base and resumed his hunt for his nemesis. There, he had a rematch with Mecha Sonic, who went haywire upon its defeat and revealed an entrance into the Gigantic Angel, where Eggman was hiding. There, Sonic found his nemesis, only for the doctor to use a trap he had set for the hedgehog to drop him into the depths of his base. However, Sonic soon caught up to Eggman and surprised the doctor, who tried fighting back using another one of his creations. Despite the odds, the hero still defeated his nemesis and chased him to the Last Utopia. There, Eggman appeared before Sonic in a mech powered by the Chaos Emerald he stole from Knuckles. However, the hedgehog took back the Emerald and defeated the mech. Eggman then tried to escape into space. In response, Sonic, having gathered all the Chaos Emeralds at this point, transformed into Super Sonic and chased after his nemesis. In the depths of space, the hedgehog defeated the villaineous doctor when he tried using his last mech against him, and returned to earth where he reunited with Tails onboard the Tornado, just before the Chaos Emeralds scattered themselves. With peace restored to the world, Sonic headed out on new adventures with the fox.

In Sonic Pinball Party, right after foiling Dr. Eggman's last plan for world domination, Sonic learned that the evil scientist was up to no good again. From Casinopolis, the doctor had been busy kidnapping Animals and turning them into Badniks. In addition, the doctor had also brainwashed Tails and Amy into serving him. To save his friends, Sonic enrolled himself in the Egg Cup Tournament hosted in Casinopolis.

During the first round, Sonic faced off against Knuckles (who had joined the tournament out of own free will) and won. After that, he faced Tails and Amy, whom he freed from Eggman's control after beating them during their respective rounds. Making it to the finals, Sonic squared off against Metal Sonic and won, only for Eggman to intrude on the tournament and challenge Sonic to an additional match. After defeating Eggman, Sonic rescued all the Animals.

In Sonic Jump, Sonic received a call from Tails, who warned him that Dr. Eggman had obtained a Chaos Emerald for an unknown purpose. As the signal began to fade out however, Tails told Sonic to meet him at his research facility. Intrigued, Sonic went to the facility, only to witness Tails get kidnapped by Eggman, who escaped with Tails in a helicopter. Pursuing Eggman to his flying fortress in the sky, Sonic came to Tails' rescue. However, as Eggman made his escape, he warned Sonic that he had obtained six of the Chaos Emeralds, and that there was only one left to find. Following Tails' hunches, Sonic headed to Angel Island, which was the location of the last Chaos Emerald.

Upon arriving on Angel Island, Sonic and Tails found Eggman demanding Knuckles to hand over the Chaos Emerald. Unfortunately, Eggman snatched the Emerald when Knuckles turned his attention to Sonic. Now possessing all the Chaos Emeralds, Eggman gloated to the heroes that he planned to harness the Emeralds' power to create the "Brainwash Beam", which would let him take over the world, before taking off. As Sonic began arguing with Knuckles over whose fault this was, Tails stopped them. Tails then suggested that Eggman needed to head into space in order for the Brainwash Beam to cover the whole world. As such, Sonic and his friends headed for South America, which was supposedly where Eggman had a space station to launch a rocket from. When they arrived however, Eggman had already prepared the rocket launch and was heading into space. Not willing to give up, Sonic asked for a way to catch up to Eggman and Tails replied that it was possible using the space station's controls. With them, Sonic launched himself into space, where he eventually caught up with Eggman and destroyed his space satellite containing the Brainwash Beam, scattering the Chaos Emeralds around the earth before falling back down to the planet himself.

Recovering from his fall, Sonic reunited with his friends. After Knuckles reminded him of the Chaos Emeralds however, Sonic went in search of them, but could not find the last one. Suspecting that Eggman had it, Sonic returned to space where he successfully defeated Eggman one last time and took back the Emerald. In the aftermath, Eggman disappeared, although not before swearing revenge at Sonic. Returning home, Sonic received praise from his friends, although Knuckles noted that Eggman would probably be back soon.

In Sega Superstars, Sonic is a playable character in the Sonic the Hedgehog mini-game.

In Sonic the Animation, after having foiled Dr. Eggman's plans so many times, Sonic was given the "Hero of the Year" title, much to his adversary's annoyance. Wanting to ruin the hedgehog's image, the doctor began masquadering as him to ruin a city near his base, ruining his reputation in the span of a few minutes and being deemed the "Worst Person of the Year". In the aftermath, Sonic, unaware of the havok "he" had caused, became the target of the public's anger and began yelling at him, much to his confusion. He then noticed Eggman, still disguised as him, standing on a roof before losing balance and falling off.

In Sonic Riders: Zero Gravity, a few months after the EX World Grand Prix, Sonic was driving with Tails and Knuckles through Monopole, fumbling thoughtfully with a mysterious meteorite Tails had found the other night. On their way to Megalo Station, they were attacked by SCR-HD and some SCR-GPs, a part of a currently global robot rampage who were after the meteorite. In the insuring chase, the group fell out from a 300-story high building, but Sonic was saved by the meteorite by using it to manipulate gravity.

As Sonic and his friends tried to hide from the robots, they met Amy who revealed she was being chased by the robots because she had a meteorite similar to Sonic's. Sonic then decided to head to the robots' creator, MeteorTech, to get some answers. There, Sonic and the gang were discovered by security, but then the Babylon Rogues arrived and Jet repelled the security robots with another meteorite. As Jet demanded the meteorites, called the Arks of the Cosmos, and said he wanted to challenge Sonic to a race, Sonic was eager to accept it, but decided to postpone it when more robots showed up.

As Sonic raced Jet to the control room, Sonic and the others were surprised to find Dr. Eggman, who was the owner of MeteorTech, and Sonic suspected he was behind the robot rampage. While Eggman claimed to have no part in it, Sonic got suspicious when Eggman recognized his Ark of the Cosmos. After forcing him, Eggman revealed that MeteorTech's mother computer was powered by one of the Arks of the Cosmos and that the robot's leader, SCR-HD, which also had an Ark of the Cosmos, sought them out for reasons unknown. The group then noticed that Amy was gone, and saw on the computer screen that she was being chased by SCR-HD and Storm, and Sonic left with his friends to save her.

When they found Amy, Sonic, Knuckles, and Tails heard from Amy that SCR-HD had suddenly blown up and that Storm had taken its Ark of the Cosmos. However, Tails deduced that they had to remove the Ark of the Cosmos in MeteoTech's mother computer to stop the robots. As they tried to figure where the mother computer could be, Amy remembered Storm mentioning Gigan Rocks, which held information about the Ark of the Cosmos, so Sonic and the others went there to find clues.

At Gigan Rocks, the group learned from the ruins that the Arks of the Cosmos were power units for Babylon Garden. The group then saw the Babylon Rogues chase after Eggman above them, and learned from both that and the ruins the location of MeteoTech's mother computer. When Sonic and his friends got to this location, they found the Crimson Tower and the Babylon Rogues, who told them Eggman had stolen their Arks of the Cosmos. As they conclude that Eggman planned to use them to control all the world's robots for world domination, Sonic almost headed out, when Jet demanded a race for the Arks of the Cosmos and title of the fastest in the universe, which Sonic accepted.

The race eventually came to a draw, as both Sonic and Jet stopped Eggman at the same time and stopped the robot rampage. After Babylon Garden appeared due to all Arks of the Cosmos being present, Sonic gave his Arks of the Cosmos to Jet and took his leave, content with settling the score with Jet at the next World Grand Prix. However, SCR-HD then appeared and took all five Arks of the Cosmos to Babylon Garden, which transformed it into Astral Babylon and made it form a black hole that threatened to consume the planet. Sonic then headed to Astral Babylon with his team and the Babylon Rogues to disconnect the ship's engine and stop the black hole where they faced and defeated Master Core: ABIS, thus saving the world.

Later, Sonic, Knuckles, Tails, and Amy returned to Monopole, where they learned from Tails of how the Arks of the Cosmos made the robots run amok. No sooner, Sonic was challenged by Jet to a new race, which Sonic accepted, and raced Jet throughout the city.

In Sonic Free Riders, Sonic and the rest of Team Sonic signed up to compete in the second World Grand Prix hosted by Dr. Eggman for the sake of the competition rather than the prizes. As they were interviewed by Omochao, Sonic was ready to start racing, though he suspected that Eggman was up to something.

In their first race, Team Heroes faced Team Rose, who Sonic was openly disappointed about facing. During the challenges, Sonic was berated by Amy for not going easy, but Sonic insisted on competing seriously. Once Team Heroes had beaten Team Rose, Amy demanded a date with Sonic to make it up for this, but Sonic wondered why he owed her a date for winning.

For their next race, Sonic and Team Heroes went up against Team Dark. During the race, Knuckles suspected Team Dark's member, E-10000B of foul play, but Sonic thought that he was just imaging it.

Sonic and the team eventually beat Team Dark and advanced to the finals, where they met Team Babylon, though Sonic was not surprised about facing Jet in the finals. In the final face-off, Sonic and his team beat Team Babylon, seemingly securing their victory. However, when he heard Jet had mechanical troubles during the race, Sonic called for a rematch, intending to have a fair race. Sonic thus faced Jet in a one-on-one race and defeated him. As Team Heroes was commended as champions, Sonic told the viewers how incredible he felt before noticing Team Babylon had left. When Omochao tracked Team Babylon down, Sonic thanked Jet for the race and told him that he looked forward to their future rematch.

As the tournament progressed, Team Heroes had their own fair share of losses, but Sonic continuously displayed good sportsmanship. At the end of the tournament, Sonic and the other teams came to the awards ceremony to collect their prizes, but Eggman made them have a final race against his "ultimate Gear-Jockey robot", which made Sonic suspicious. After the race, Eggman revealed that he used the World Grand Prix to gather the riders' racing data with his E-10000 robots to create the ultimate Extreme Gear which he could use for his own agenda, but Sonic thought his plan was lame. In retaliation, Eggman challenged Sonic and the others to a race, but lost. Sonic then noticed E-10000B was acting funny before seeing Metal Sonic emerging from it and heard that Metal Sonic had stolen Eggman's data and replaced it with fake data. Sonic then noticed that Metal Sonic was challenging him to a race and despite being told that Metal Sonic could not be beaten, Sonic gladly accepted the challenge.

Eventually, Sonic was victorious in the race and forced Metal Sonic to run away. As Eggman cursed being tricked, Sonic mocked Eggman for ruining his own plan. As the World Grand Prix drew to a close and the other teams began to leave, Sonic insisted that they all had a great time at the World Grand Prix nonetheless.

In Sonic the Hedgehog (2006), Sonic visited Soleanna during the Festival of the Sun where he saved their monarch Princess Elise from Dr. Eggman who was after the Flames of Disaster known as Iblis to help him rule the world which was sealed inside Elise. As Sonic brought Elise to safety, he got distracted by Eggman's mechs and Eggman kidnapped Elise and escaped, though not before Sonic received her Chaos Emerald. Determined to save Elise, Sonic teamed up with Tails the next day and tried to catch the Egg Carrier at Wave Ocean, but failed.

After returning to the city, Sonic and Tails learned Eggman was in Dusty Desert. There, they found Elise, only for Eggman to attack them with the Egg Cerberus. After Sonic destroyed it, Sonic escaped Eggman's forces with Elise by letting Tails create a diversion. As they escaped, Elise treated Sonic's injuries and apologized for them, but Sonic insisted her smile was all he needed. Sonic was then filled in on the Flames of Disaster and Solaris by Elise, who grew worried of what Eggman would do with it. However, Sonic cheered her up with a run and gave her some advice to go by.

Back in Castle Town with Elise, Sonic was attacked by Silver the Hedgehog, who claimed that Sonic would destroy his world. Sonic initially had the upper hand, but Silver caught him off-guard and incapacitated him. Meanwhile, Sonic saw Eggman kidnap Elise again, but was unable to save her. Luckily, Sonic was saved when Amy stopped Silver from finishing him off, and he chased after Eggman. Sonic then met up with Tails and Knuckles in Soleanna's New City, who gave him a message from Eggman demanding Sonic's Chaos Emerald in exchange for Elise. Despite knowing it was a trap, Sonic, Tails and Knuckles arrived at Eggman's HQ in White Acropolis, where Sonic gave Eggman the Chaos Emerald, but was tricked and sent to the future by Eggman's prototype time machine with his friends. Arriving in a ravaged future, they met Shadow and Rouge. They then decided to work together to get home by finding enough Chaos Emeralds for a Chaos Control powerful enough for time travel.

While searching for the Chaos Emeralds, Sonic, Tails, and Knuckles briefly saw Silver and Blaze talking with Mephiles before they went back in time. From their database, the group learned that Elise would die in the Egg Carrier's future crash-landing, leaving Sonic more determined than ever to save her. Locating a Chaos Emerald in Flame Core, Sonic his friends met up with Rouge and Shadow and journeyed there, where they were attacked by Iblis when they found the Emerald. After Sonic and Shadow defeated it, they used their Chaos Emeralds to make a rift back to the present. Through it, Sonic, Tails, and Knuckles got back to the present.

Locating Elise on Eggman's train, Sonic managed to save the princess, but was attack by Silver again. While caught in the fight, Sonic saw Eggman kidnap Elise again. Fortunately, Shadow arrived and held Silver off while Sonic saved Elise again and destroyed the Egg Genesis. As they fled from Eggman's robots, Sonic took Elise to a beautiful location to cheer her up. There, Sonic told Elise that he would leave once he defeated Eggman, but cheered her up when she was sad about his departure.

After that, Sonic returned Elise to the castle but after hearing that Eggman kidnapped Elise again, he ran off to save her. On his way, Sonic was attacked by Eggman's robots, but was assisted by Silver, who now wanted help Sonic. Unfortunately, Sonic was too late as Eggman's ship crashed and exploded with Elise inside as predicted. However, Silver had the plan to send Sonic back in time to save Elise by using Chaos Control with two Chaos Emeralds to create a rift. Sonic promised Silver to change his future by saving Elise before heading into the rift. Arriving at the day before, Sonic bordered the Egg Carrier as it departed Aquatic Base and defeated Eggman in the Egg Wyvern before narrowly escaping the exploding Egg Carrier with Elise.

On their way back to the city, Sonic and Elise were distracted by a Chaos Emerald. Mephiles then appeared and impaled Sonic, killing him. Despairing over Sonic's death, Elise cried and released Iblis from within her, allowing Mephiles to merge with Iblis. Now whole again, Solaris created a spatial distortion that transported Sonic's body and Elise to the End of the World. There, Sonic's allies and Eggman saw Sonic's dead body in Elise's arms, each showing sadness at his death.

Sonic's soul had yet to pass on at this point though and Elise sensed his presence. Realizing that it was not too late, everyone gathered all the Chaos Emeralds to restore Sonic to life. Revived as Super Sonic by Elise's kiss and the Emeralds, Sonic turned Shadow and Silver into Super Shadow and Super Silver and they defeated Solaris. Sonic and Elise were then sent back to when Solaris was just a flame. If Elise blew out the candle it would destroy Solaris forever, but it would mean the events leading to Elise's meeting with Sonic would never had happened. Sonic, however, encouraged Elise to accept things as they were and she extinguished the candle. Time was reverted, but Sonic still traveled to Soleanna where he watched the festival happily, hinting that he still remembered the erased events of this adventure.

In Sonic Rivals, when Onyx Island appeared at the sea, Sonic and Tails went to investigate it, suspecting it was another of Dr. Eggman's schemes. When they arrived, Sonic spotted who he believed to be Dr. Eggman, but was really Dr. Eggman Nega disguised as Eggman. Sonic confronted the doctor, but Eggman Nega pulled out a card depicting Amy Rose and explained he had turned Amy into a card with a special camera. Sonic did not believe it at first, but as Tails stated his opinion on Eggman Nega's claim, a flash from Eggman Nega's camera blinded Sonic and when he regained his sight, Tails was gone. Sonic asked Eggman Nega what he had done, and the doctor revealed that he had turned Tails into a card as well. At the same time, Knuckles appeared, believing Eggman Nega had stolen the Master Emerald. As Eggman Nega showed he had turned the Master Emerald it into a card as well, he escaped, and Sonic raced Knuckles to see who got to face Eggman Nega first.

Eventually, the two found Eggman Nega and teamed up to fend off the Egg Turtle, but Eggman Nega escaped. As Sonic followed him, however, he ran into Silver, who had come to bring Eggman Nega back to the future. As Silver insisted on getting to Eggman Nega first, Sonic gladly accepted the challenge and they raced after Eggman Nega. As Sonic reached Eggman Nega, he demanded the cards back, but Silver insisted on going first, and it broke down to a fight between them and Eggman Nega's Egg Falcon.

Despite defeating the Egg Falcon, Sonic and Silver continued to fight, until Silver teleported Sonic to another location. Surprised, Sonic looked around and found Shadow. Seeing that Shadow was after Eggman Nega too, Sonic challenged him to see who got to Eggman Nega first. Sonic eventually outraced Shadow and found Eggman Nega, and demanded to know his plan. Eggman Nega however, retaliated by unleashing Metal Sonic on Sonic. After defeating Metal Sonic, Sonic thought about Eggman Nega's plan, but ran into Silver again. Sonic then told Silver that he would share his information with Silver if he beat him in a race to Eggman Nega, and the pair chased the doctor again.

Sonic and Silver eventually cornered Eggman Nega and Sonic demanded Tails' card back, but Eggman Nega fought him and Silver with the Egg Lynx. After defeating the Egg Lynx, Sonic reclaimed Tails' card while Eggman Nega escaped. Sonic then freed Tails from his card, but then Knuckles reappeared and Sonic was challenged by him to race to Eggman Nega first.

Sonic eventually reached Eggman Nega first where he faced the Egg Kong and an upgraded Metal Sonic, but still won. Frustrated at his constant defeats, Eggman Nega told Sonic that he now planned to turn the world into a card and escaped, much to Sonic's frustration. Tails, however, appeared in the Tornado and they traveled to Eggman Nega's base. As Sonic ventured to and through Eggman Nega's base, he met Knuckles, Shadow and Silver, and they each put aside their differences to help stop Eggman Nega.

At the center of the base, Sonic and the others found a large spaceship with Eggman Nega's special camera equipped on that he planned to use to turn the world into a card. Sonic then noticed that Eggman Nega planned to fuel the device with Amy's card and some other cards, but the four rivals destroyed the spaceship as it took off, thus foiling Eggman Nega's plan. After the battle, Sonic freed Amy from her card, who believed this meant that she and Sonic were to live happily together. Sonic, however, came up with the excuse that he had to find the other captives in Eggman Nega's cards and ran off.

In Sonic Rivals 2, Sonic arrived on an island to meet Tails who told Sonic that a group of Chao have gone missing and that he suspected Dr. Eggman, who was on the island, was behind it. As such, Sonic teamed up with Tails to find Eggman and get answers. No sooner, Sonic saw Knuckles with Rouge and teased Knuckles. Regardless, Knuckles asked if he had seen Dr. Eggman since the Master Emerald had been stolen. Unsurprised, Sonic insisted on finding Dr. Eggman first and the two competed to see who would find the doctor.

Sonic and the others eventually found Dr. Eggman, who really was Eggman Nega masquerading as Dr. Eggman. Sonic demanded to know what he had done with the Chao, but Eggman Nega pretended to be innocent and attacked Sonic and the others in his Egg Liner. After the fight, Sonic and Tails followed Eggman Nega to Sunset Forest Zone. As they lost the doctor's trail, they found a page dropped by Eggman Nega mentioning a creature called the Ifrit. Soon after, Sonic ran into Silver, who was looking for Eggman Nega as well and challenged him to see who faced Eggman Nega first.

Sonic and Tails eventually caught up to Eggman Nega with Silver and Espio, but Eggman Nega attacked them in his Egg Crawler. After the fight, Sonic and Tails followed Eggman Nega to Neon Palace Zone discovering more dropped pages on the Ifrit. There, Sonic met Shadow and Metal Sonic. Suspicious at why Metal Sonic was involved, Sonic and Tails followed the pair, with Sonic following Shadow. After catching up with Shadow, Sonic began questioning him, but the two fought when Shadow refused to answer. After the fight, Sonic and Shadow found Eggman Nega who attacked in his Egg Dealer, but the group defeated him.

Afterwards, Sonic and Tails tracked Eggman Nega to Frontier Canyon Zone, where they found more dropped pages on the Ifrit and Sonic suspected it was involved in Eggman Nega's plans. They then met Knuckles and Rouge again, who needed Rings for their Emerald Detector and Sonic volunteered himself and Tails to find some. After Sonic had found Rings, however, Espio appeared and took them, but Sonic pursued him. Afterwards, Sonic found Eggman Nega again and fought his Egg Bull. Afterwards, the doctor revealed his plan to release the Ifrit from a portal within a haunted mansion and Sonic and Tails headed there to stop the Ifrit.

At the mansion, Sonic and Tails split up. While searching, Sonic met a shape-shifting ghost of himself and defeated it in battle. After reuniting with Tails, they found Eggman Nega with their ghost counterparts. After fighting Eggman Nega in his Egg Phantom, Tails found the missing Chao, which Eggman Nega had planned to feed to the Ifrit to make it invincible, and Sonic got Tails to bring them to safety.

The two eventually found the portal to the Ifrit's dimension, which was about to close and they headed inside to find Eggman Nega before it was too late. There, they faced the Ifrit itself, who took control of Tails, forcing Sonic to face both Tails and the Ifrit to stop the end of the world. Though Sonic was occasionally taken over by the Ifrit too, the two friends defeated the Ifrit, thus keeping it from leaving its world and escaped before the portal closed. With the Ifrit stopped, the world saved and the Chao rescued, Sonic and Tails headed to the Chao Garden to get some rest.

In Sonic and the Secret Rings, Sonic fell asleep while reading the Arabian Nights. When he woke and tried to check his clock however, he found a ring, from which a djinn named Shahra emerged from. She told Sonic about how the mighty Erazor Djinn was destroying the World of the Arabian Nights, absorbing power of the Arabian Nights storybook and erasing its stories. If Erazor was not stopped, he would be able to enter the real world. With Sonic agreeing to help, Shahra handed Sonic her ring, which sealed their contract as master and genie. Following Shahra's instructions, Sonic rubbed the ring, making Shahra summit to his service so she could bring him into the world of the Arabian Nights. After wshing for some handkerchief for his cold, Sonic decided to get serious and had Shahra take them into the world of the Arabian Nights. While traveling through Lost Prologue though, Sonic and Shahra encountered the Erazor Djinn. When Shahra refused to gather the seven World Rings for him, Erazor shot a fiery flame at Shahra, but Sonic jumped in and took the blow. Revealing that this cursed flame would burn away Sonic's lifeforce until it killed him, Erazor told Sonic that he would remove the curse if he brought him the World Rings, before departing to claim the life of King Shahryar. To stop Erazor, Sonic and Shahra headed to King Shahryar's palace in Sand Oasis. There, they found Shahryar, whom Sonic initially mistook for Dr. Eggman. Soon after, Shahryar was kidnapped by Erazor. Sonic thus went to save him, saving Ali Baba from Erazor's minions along the way. During their meeting, Sonic mistook Ali Baba for Tails. After then defeating the Sand Scorpion summoned by Erazor, Sonic and Shahra found the Yellow Ring. Shahra then revealed to Sonic that whoever collects the seven World Rings will be able to open the portal between worlds at the cost of their own life. Sonic, however, assured Shahra, who felt guilty over bringing this upon Sonic, that he was in a pinch either way with Erazor's curse laid on him, and assured her that he would fix this quickly. Sonic later caught up to Shahryar and saved him despite his dislike of him.

Later, in Dinosaur Jungle, Sonic and Shahra found the Green Ring. Sonic then tried to wish his curse away with Shahra's aid, but Shahra did not have the power to do it. Telling her not to worry about it for now, Shahra and Sonic headed out. Arriving in Evil Foundry, Sonic and Shahra confronted Erazor as he summoned the Ifrit Golem to burn away the pages of the Arabian Nights. Unable to wound the Ifrit Golem, Sonic used Shahra's magic to induce Time Break and flee from the scene. Once safe, Sonic and Shahra sought aid from Ali Baba to defeat the Ifrit Golem. Ali Baba revaled that Sinbad the Sailor would probably know how to stop the Ifrit Golem. However, he was currently kidnapped and brought into the skies by the Rukh. Sonic thus had Shahra conjure up a flying carpet to take them to Levitated Ruin on. There, Sonic found a captured Sinbad, whom Sonic mistook for Knuckles. After Sonic and Shahra freed him and told him of their situation, Sinbad told them that they could defeat the Ifrit Golem by poruing water on it. Sonic mocked Sinbad's words of wisdom, sparking a brief fight between those two until Ali Baba broke it up and pointed out where they were going to get enough water to pull off that feat. Getting to that, Sinbad revealed that his Water Blue Ring could summon rain storms. However, it had been take by the pirates who kidnapped him. Sonic and Shahra thus set out to find the pirates, finding the Blue Ring along the way. Afterward, Shahra gave Sonic a strange orb to use as their last resort if all else failed to stop Erazor. Arriving in Pirate Storm, Sonic defeated Captain Bemoth, allowing him and Shahra to retrieve the Water Blue Ring. Sonic and Shahra then returned to Evil Foundry where Sonic used the Water Blue to summon a storm that weakened the Ifrit Golem enough for him to defeat it. Upon its defeat, however, the Ifrit Golem released a bomb set to explode. Sonic thus took the bomb out of the Evil Foundry and had it explode safely outside. As it detonated, the bomb also released the Red Ring, which Sonic and Shahra claimed. Afterward, Sonic was taken to King Solomon's domain, the Skeleton Dome, by Shahra in hopes of getting some explanations to the strange occurrences with djinns lately from the king himself. However, all they found was Solomon's head, the undead king having been disassembled by the 40 Thieves, whom Erazor had resurrected as evil djinns and sent to attack him. Offering to help Solomon, Sonic and Shahra eliminated the 40 Thieves and recovered Solomon's missing body parts. Along the way, Sonic and Shahra also found the White Ring. After then reassembling Solomon, the king told Sonic and Shahra about the reason for the djinns' madness and the effects of Erazor's actions. However, he also revealed that they could defeat Erazor by sealing him away in his Magic Lamp.

Taking the advice of Solomon, Sonic and Shahra went to Erazor's Night Palace and opened its gates using the White Ring. However, Sonic then felt himself losing strength as his curse began to take its toll. Despite everything though, he would not give up. He and Shahra soon after found the Purple Ring. Shahra then revealed Erazor's past to Sonic, telling him of how he was condemned to fulfill the wishes of a thousand people as punishment for his misdeeds, only to get a renewed hated for people when he was done. Soon after, Sonic and found Erazor, who wanted the World Rings from Sonic. Engaging him in battle, Sonic defeated Erazor, who retreated into a sealed room. Recalling the prophecies about the opening of the door to other worlds, Sonic and Shahra used the seven World Rings to open the door into Erazor. Inside, Shahra was then told by Erazor to give the Worlds Rings to him, saying that she had been using Sonic to gather the World Rings for him. As Shahra complied, Sonic ordered her to do what she truly thought was right, causing Shahra to snap mentally. Taking the World Rings, Erazor tried to sacrifice Sonic to unlock the power of the World Rings. However, Shahra took the blow intended for Sonic and perished in his arms, apologizing to Sonic with her last strength. Due to Shahra's interference though, the control of the World Rings remained incomplete. As such, when Erazor harnessed the World Rings, he turned into the monstrous Alf Layla wa-Layla, intend to remake the world of the Arabian Nights in his twisted image. Sonic, however, managed to absorb the Red, Green, and Purple World Rings that ejected from Erazor, causing him to transform into Darkspine Sonic. With this power, Sonic defeated Alf Layla wa-Layla, who reverted back to normal. As Erazor recovered though, Sonic unveiled his Magic Lamp, which had original been the orb Shahra gave him, only to turn back to a lamp when Shahra died. Using the lamp, Sonic made Erazor grant him three wishes: bring Shahra back to life, restore the Arabian Nights to the way they were, and seal himself up in his lamp for the rest of time. Powerless against his lamp, Erazor fulfilled all of Sonic's wishes, before returning to his lamp forever. Afterward, Sonic saw Shahra cry over Erazor's fate, so he had her bring forth a mountain of handkerchiefs which she could use to cry for as much as she needed.

After these events, Sonic and Shahra threw the Magic Lamp into the depths of the Evil Foundry. Sonic then set out on several new adventures with Ali Baba and Sinbad before finally finding a way to return home to his world, although not before saying goodbye to Shahra.

In Sonic and the Black Knight, Sonic was having chili dogs while waiting for Amy, having somehow been talked into going on a date with her. Suddenly though, he was called into the world of Camelot by Merlina the Wizard. Upon his arrival, Sonic met Merlina and quickly dispatched the Knights of the Underworld who were following her. Sonic then tried to take on Arthur, but he was restrained by Merlina, who teleported them away. Soon after, Sonic was filled in on the situation by Merlina, who explained that her kingdom was being tormented by Arthur, who was once a wise and just king until he was bewitched by the scabbard of Excalibur's immortality-bestowing magic and became the tyrannical Black Knight. Learning that Arthur was also impossible to defeat for as long as he wielded the scabbard, Sonic was directed to Misty Lake to recover a sacred sword, although not before getting a gaunlet from Merlina as a gift. At the lake, Sonic found Caliburn and pulled it out of the rock. However, Sonic then discovered Caliburn was alive and could talk, and that he did not think highly of Sonic. Regardless, Sonic wielded Caliburn against Arthur when when the king came to attack him. Unable to overcome the immortal Arthur, Sonic saw him take his leave when he deemed him not worth slaying. As Sonic and Caliburn argued, Merlina told them to seek out Nimue, the scabbard of Excalibur's original owner, who would know of a way to defeat Arthur. Along the way however, Sonic made a stop at the Blacksmith, who Sonic initially mistook for Tails, in Camelot Castle to sharpen Caliburn's blunt blade.

On his way to Nimue, Sonic was challenged by Sir Lancelot, whom Sonic mistook for Shadow. Thanks to Lancelot's carelessness, Sonic beat him and claimed his sword, Arondight. As Claiburn lectured Sonic, the two arrived at the lake. There, Sonic mistook Nimue for Amy and freaked out, but Caliburn had him calm down and show proper behavior towards Nimue. While having tea, Nimue told Sonic that she would only reveal the scabbard's secrets if he passed a test of true knighthood, and gave him three tasks to finish within three days: free the innocent from King Arthur's dungeons, give aid to those in need, and defeat the Knights of the Underworld. While working on his tasks however, Sonic encountered a child who needed someone to save her family from a dragon. Despite Caliburn telling him that he would never complete Nimue's tasks in time if he helped the child out, Sonic decided to do it anyway. On the way to Dragon's Lair however, Sonic met Sir Gawain, whom he told looked like a "knucklehead" he knew. Despite attempting to explain himself, Gawain concluded that Sonic was only after the dragon's treasure and attacked him. After defeating Gawain, Sonic stopped him from killing himself by confiscating Galatine. Gawain insisted that he deserved death as he, as a knight, had failed his king, but Sonic asked him if there was more to being a knight than serving a king before taking his leave.

After saving the townspeople, though at the cost of running out of time for their tasks, Sonic and Caliburn returned to the child. There, the child revealed herself to be Nimue in disguise and told Sonic that he had proven himself a true knight. Back at the lake, Sonic was told by Nimue that to blunt the power of the scabbard of Excalibur, he had to collect all the sacred swords from the Knights of the Round Table. Having already gotten two of them, Sonic and Caliburn left to get the last one from Sir Percival. Finding her in Molten Mine, Sonic told Percival upon her request his name and that his only master was the wind. Dubbed the "Knight of the Wind" by Percival, the two clashed, with Sonic emerging triumphant. However, the battle had forced Percival to the edge of a lava lake, which she fell towards when she lost her footing. However, Sonic caught Perical and broke their fall by digging Caliburn into the cliff. This act finally earned him Caliburn's respect and was titled "Sir Sonic, Knight of the Wind".

After getting Percival's Laevatein, Sonic met with Merlina, who told him he could find Arthur on the island of Avalon: Traveling there, Sonic found and defeated Arthur in battle. When Arthur then tried using the scabbard of Excalibur, Sonic nullified its magic with the sacred swords. Taking advantage of this opening, Sonic struck down Arthur, who vanished into a puff of smoke. With the scabbard in hand, Sonic found Merlina, cornered by the Knights of the Round Table, in Camelot Castle. As Merlina revealed that Arthur was never truly real, she took the scabbard of Excalibur from Sonic and announced that she would use it to make her kingdom eternal. As Merlina's magic tore the castle apart, Sonic and the Knights of the Round Table escaped to the outskirts where they saw the forces of the Underworld slowly consume the kingdom. Seeing the Knights of the Round Table unable to act, Sonic reminded them that being a knight meant more than serving a king. Nimue then appeared and backed Sonic up by presenting a plan to contain Merlina's influence by inserting the sacred swords into barrier stones around the kingdom and form a barrier around Merlina's position. After Sonic had activated the barrier stone in Dragon's Lair, he and Caliburn slipped into the Dark Hollow to deal with Merlina.

When Sonic found Merlina, now the Dark Queen, Merlina revealed to Sonic the grim fate that awaited the kingdom and that she sought to prevent it by making a perfect kingdom that will never end with the scabbard's power. Sonic, however, turned a deaf ear to Merlina's words, insisting there was no good in a world like that, and tried to attack her. However, Sonic only received a massive beating from Merlina and got Caliburn cut in half. Despite this, Sonic refused to give up, and his determination awoke the long-lost light of the sacred sword. The Knights of the Round Table then sent their sacred swords to Sonic, their power transforming him and Caliburn into Excalibur Sonic and Excalibur. With this power, Sonic and Caliburn defeated Merlina. In the aftermath, Sonic convinced Merlina that having an end to the world was necessary and just live her life to the fullest in the time she had. After Sonic then thanked the Knights of the Round Table for their aid, the group thought about disbanding without a king to serve. Caliburn, however, revealed that Sonic was the true King Arthur, much to Sonic's surprise as the Knights of the Round Table bowed before him. Despite this revelation though, Sonic returned home and told his big adventure to Amy. However, Amy thought it was just an excuse for forgetting their date, prompting Sonic to run away from Amy as she pulled out her Piko Piko Hammer.

In Sonic Unleashed, after an untold series of adventures for Sonic, he arrived at Dr. Eggman's massive space fleet where he faced a battalion of Egg Fighters and Eggman in a powerful mech. During the battle, Sonic became Super Sonic and destroyed Eggman's mech and his fleet. When he corned Eggman on a space station however, Sonic was caught in an energy field where the Chaos Emeralds were painfully ripped from him, returning him to normal. With the Emeralds' power, Eggman fired an energy blast that broke the earth apart and awoke an ancient creature called Dark Gaia to harness its power. In the process, a part of Dark Gaia's energy infected Sonic and turned him into a "Werehog". Sonic was then ejected from the station with the powerless Chaos Emeralds.

Moments before impacting the earth, Sonic's fall was temporarily broken by a green light. After recovering, he met an imp-like creature who noticed he had developed retrograde amnesia. Believing that he caused it by falling on the creature, Sonic promised to help recover his memories. Dawn then broke and Sonic suddenly returned to normal. The duo soon arrived at Apotos where Sonic named his new friend Chip after an ice cream they got from a local vendor. After a day's fruitless search for someone who knew Chip, Sonic realized the nature of his werehog form when he assumed it again at night. They soon after met Tails when Sonic saved him from Dark Gaia's Minions. After hearing their story, Tails took Sonic and Chip to Professor Pickle, who knew something about the global crisis, in Spagonia with the Tornado-1. When they arrived, however, they learned Eggman had kidnapped the professor.

Sonic, Tails, and Chip tracked Pickle to Mazuri where they freed him from Eggman's base and reclaimed the stolen Gaia Manuscripts. Pickle told them that Dark Gaia was behind the planet's shattering, but since it was not fully reborn, they could restore the planet and the Chaos Emeralds by placing the drained Emeralds in the Gaia Temples across the world.

Sonic and Chip soon after returned to Mazuri, where they saved the villagers from Eggman and drove him off before locating a Gaia Temple. There, with Chip's ability to activate the temple, Sonic could restore the Emerald and a continent. When returning to Spagonia at night, Sonic met Amy, but when Amy did not recognized him as a werehog, Sonic became sadden about his different appearance. He later found Amy caught in a group of people possessed by Dark Gaia, but with Chip's help, Sonic exorcised them and saved Amy. However, he left before Amy could see him, but eventually came clean with her.

Sonic and Chip continued their adventure, healing the planet one piece at a time. As the two of them restored the sixth continent however, Sonic saw Chip regaining his memories inside the sixth temple. Chip revealed that his real name was Light Gaia and that he had been fighting Dark Gaia in a continuous cycle of destruction and restoration of the planet since the dawn of time. Sonic thought that Chip was the reason he remained himself as a Werehog instead of behaving differently like the other people infected by Dark Gaia's influence, but Chip revealed that it was Sonic's own strong heart that kept his darkness at bay. Chip then tried to leave to stop Dark Gaia on his own, but Sonic convinced him to let him help him.

Arriving in Eggmanland, the duo activated the last temple. As the last continent returned, Sonic the Werehog and Chip were attacked by Eggman in his Egg Dragoon. After Sonic beat Eggman at the planet's core, Dark Gaia itself appeared and knocked Eggman away. As they shuffled, Dark Gaia drew its last fragment out of Sonic to complete itself, curing Sonic of his Werehog condition, but also weakening him. Fortunately, Sonic was saved when Chip called the Gaia Temples to him and formed the Gaia Colossus and together they fought Dark Gaia. However, Dark Gaia soon matured and became Perfect Dark Gaia and began casting the world into darkness. Sonic, however, harnessed the Chaos Emeralds and became Super Sonic. Together with Chip, they defeated and sealed Dark Gaia, although Super Sonic fell unconscious in his normal due to exhaustion. He was then returned to the surface by Chip, who got sealed inside the planet and returned to dormancy. Back on the surface, Sonic found Chip's necklace, which he kept as a bracelet. As he heard Chip's final goodbye, Sonic paid his respects to his friend and left for new adventures with Tails.

In Sonic the Hedgehog 4: Episode I, which takes place directly after the Angel Island incident, Sonic had just managed to finally destroy the Death Egg. With this whole ordeal over, Sonic decided to take a much-deserved break from his adventures. Sonic then parted with Tails and Knuckles for the time being and ventured out on his own to explore new parts of the world. Sonic's break was cut short, however, when Dr. Eggman, having survived their last encounter, returned to defeat Sonic with a new and improved army of Badniks. Sonic then began chasing and fighting Dr. Eggman while collecting Chaos Emeralds through the various Zones.

At the end of his journey, Sonic gave a final chase to Dr. Eggman, but Eggman retreated to the E.G.G. Station Zone, a base in space. Sonic, however, jumped onto a rising rocket and pursued the doctor. Onboard the E.G.G. Station, Sonic faced all of the past battle machines constructed by Eggman in past zones before confronting the mad scientist in a rebuilt Death Egg Robot. Despite the mech's improvements, however, Sonic defeated it and escaped the base as it began exploding, before landing in Splash Hill Zone where his adventure ended for the time being.

In Sonic the Hedgehog 4: Episode II, after having defeated Dr. Eggman onboard the E.G.G. Station Zone, Sonic spent the next few months relaxing from his adventures. When Sonic heard that Dr. Eggman had returned and was up to no good on the neighboring continent, however, he prepared to stop Eggman and sought out Tails. The two of them then headed out together in the Tornado to investigate Eggman's newest scheme.

Arriving in Sylvania Castle Zone, Sonic and Tails began investigating. They eventually found Eggman and learned the doctor planned to turn Little Planet, which had made its annual return, into a power source for his Death Egg mk.II. As such, Sonic and Tails began chasing the doctor to stop him. Along the way, they were attacked by Metal Sonic, who had returned more powerful than ever to settle the score with Sonic under the alliance of Eggman, but Sonic and Tails defeated him in each encounter.

When they got to the Sky Fortress Zone, Sonic and Tails used an escape pod to follow Eggman and Metal Sonic to the Death Egg mk.II as the flying fortress was exploding around them. Onboard, they briefly fought Dr. Eggman and Metal Sonic until the villains escaped. Soon after, Sonic was challenged to a rematch by Metal Sonic, but he and Tails beat him again. Sonic and Tails went on and faced Dr. Eggman and his Egg Heart and defeated him, making the Death Egg mk.II crash. The two of them then used some escape pods to return home while watching the Death Egg mk.II shut down and be pulled away by Little Planet's orbit.

In the Wii version of Sonic Colors, Sonic traveled to Dr. Eggman's Incredible Interstellar Amusement Park, an amusement park made of planets, before its opening day with Tails as he was suspicious of Eggman's claim to have made it to make up for his past misdeeds. There, Sonic saved two Wisps from Orbot and Cubot, where the Cyan Wisp gave him his first Color Power. Meeting with Tails, who was building a translator to understand the White Wisp Sonic saved, Sonic reported to Tails what happened before going to discover Eggman's plan. Once he found Eggman, however, Sonic was attacked by Rotatatron, which he destroyed and unintentionally sent one of its pieces into one of the nearby towers. Returning to Tails, who had the translator ready, Sonic learned from the white Wisp, named Yacker, that Eggman was catching the Wisp, and set out to save them upon Yacker's request.

While exploring one of the amusement park's planets, Sonic found a generator which he subsequently destroyed and afterward learning from Tails and Yacker that Eggman was harvesting the Wisps' Hyper-go-on. While exploring the next planet, Sonic was saved by Tails from Eggman's Mind Control Ray, though the fox was temporarily mind-controlled. Eggman then sends the local giant robot at them, but Sonic destroyed it and the local generator. Knowing now that Eggman was preparing a mind-control weapon with the Wisps' Hyper-go-on, Sonic discovered that Eggman used the generators to keep the Wisps' planets captive while he kidnapped the Wisps. Sonic then set out to destroy the remaining three generators, thinking this would stop Eggman's plans.

Traveling across Eggman's amusement park, Sonic successfully located and destroyed all the generators while at the same time freeing the captive Wisps. With the planets and the Wisps safe, Sonic and Tails returned to the Tropical Resort where they started celebrating with the freed Wisps. However, when the amusement park began to collapse due to Eggman's mind-control cannon backfiring when the doctor tried to use it, Sonic and Tails escaped to Eggman's space elevator to get back home. There, however, Eggman showed up in the Nega-Wisp Armor to crush Sonic. Wanting Tails to be safe, Sonic pushed him into the elevator and launched Tails back home, while he fought Eggman alone.

Though Sonic managed to defeat Eggman, he was still caught in the black hole created by the collapse of Eggman's mind control cannon. However, he was saved by the Wisps who got him back to Earth where he reunited with Tails and later saw the Wisps stop the black hole. Yacker then appeared and thanked Sonic and Tails for their help, but told them that he had to return to his own planet. Sonic then said goodbye to Yacker and watched the Wisps leave with the kidnapped planets.

In the console/PC version of Sonic Generations, some time after the Wisp incident, Sonic arrived to see that his friends were holding a surprise birthday party for him which he delightedly joined. During the party however, a mysterious foe called the Time Eater appeared and sucked Sonic's friends into different periods of Sonic's past. Sonic, unable to defeat it, was knocked out during the encounter and later awoke in White Space. After passing through Green Hill, Sonic was able to restore Tails and the area from a colorless frozen state. Sonic then decided to save his friends caught in White Space with the same procedure, unaware that Classic Sonic, a past version of Sonic from another dimension, was doing the same thing. When Sonic and Classic Sonic passed through a Boss Gate, however, they came across each other, where Classic Sonic went ahead and fought Dr. Eggman when the doctor appeared, only to see him get caught by the Time Eater. After that, the Sonics discovered with the help of Modern and Classic Tails that they were traveling through time and space.

Teaming up to stop the Time Eater, the Sonics progressed through White Space, restoring the frozen areas and their friends. Along the way, they learned from the Tails' that the Time Eater's actions ripped space apart, that their speed was the key to restoring space and time and finally, the Chaos Emeralds were the Time Eater's weakness, which they set their sights on collecting. When Modern Sonic later defeated Dr. Eggman in his Egg Dragoon, he and his friends witnessed Eggman getting caught the Time Eater again, much to their confusion.

The Sonics eventually obtained all the Chaos Emeralds and freed their friends before facing the Time Eater in its own domain. There, Dr. Eggman and his time-space counterpart, Classic Eggman, revealed themselves as the ones behind the Time Eater in an attempt to erase the Sonics from history so that the doctors would be victorious in the present. The two Sonics squared off against the Time Eater, but got knocked out. While passed out, however, the Sonics got support from all of their friends, allowing the Chaos Emeralds to activate and transform them both into Super Sonic. Together, they defeated the Time Eater and stopped the doctors' plan. As a result, time was restored and the Sonics returned back to Sonic's world with their friends where Sonic's birthday party left off. During the party, Sonic thanked Classic Sonic for his help before saying goodbye to him and promising him a great future when Classic Sonic and Classic Tails returned to their own world through a Time Hole left behind by the Time Eater.

In the Wii U version and PC version of Sonic Lost World, Sonic and Tails were chasing Dr. Eggman, Orbot and Cubot in the Tornado to free some Animals they had captured. As the duo went after the captured animals in a Capsule Eggman dropped from the sky, the Tornado was damaged by Eggman. Falling from the sky, Sonic and Tails came across the Lost Hex. There, Sonic found the lost capsule and reported back to Amy and Knuckles. Soon after, Sonic found Eggman with the Deadly Six, a group of Zeti Eggman controlled. While Eggman left Zazz to finish him, Sonic defeated Zazz and reunited with Tails. The duo then left to find Eggman.

After Sonic met and fought Zomom, he and Tails found Eggman scolding the Deadly Six. Despite Tails' warnings, Sonic knocked away the conch Eggman used to control the Zeti. However, this allowed the Deadly Six to rebel against Eggman by taking control of his Badniks and using them to attack everyone. When Tails got injured, Sonic escaped with Eggman, Orbot, and Cubot to bring Tails to safety.

After escaping, Sonic and Tails parted with Eggman and his lackeys to deal with the Zeti. Meanwhile, they were contacted by Amy, who informed them that something was draining the world of life. After Sonic had an encounter with Master Zik, he and Tails met Eggman again, who revealed the Deadly Six were using his Extractor to destroy the Earth. Reluctantly, Sonic teamed up with Eggman to bring the doctor through the Zeti and have him shut the Extractor down properly.

On their way, Sonic realized that Tails was mad at him for entrusting Eggman rather than him to stop the Extractor. After Sonic fought off Zeena, his group were briefly contacted by Zavok, who stated the futility of their actions. Sonic would later argue with Eggman on how to beat the Zeti when Tails got attacked by Cubot when he let him on a Crabmeat. However, Eggman saved him. Though perplexed by Eggman's behavior, Sonic scolded Tails. Sonic would later try to open a capsule, but Tails stopped him, having discovered it was a trap from the Deadly Six, though Tails was caught and taken away in the process. Coming across Zor, Sonic demanded him to return Tails. Instead, Zor fled, leaving Sonic to confront him in battle.

Sonic later came across Zavok who revealed his plans to roboticize Tails. As Sonic chased after Zavok and fought him, Sonic lost contact with Amy on the Miles Electric as her life dwindled away. Finally close to the Extractor, Sonic and Eggman were attacked by Zazz and Zomom, pushing them into a lava pit. Sonic, however, was saved by Eggman, though Eggman would fall into the lava pit. Continuing on alone, Sonic beat Zazz, Zomom and Master Zik for good, though he was disheartened over having seemingly lost his friends. Confronted by Zavok, Zeena and Zor, Sonic was shocked to see Tails had seemingly become a robot. However, when Tails was ordered to kill him, Tails revealed he was just fine and attacked the Zeti. His resolve restored, Sonic beat Zeena, Zor, and Zavok for good.

With the Zeti gone, Sonic and Tails reached the Extractor only to see it was turned off. Eggman then showed up in a new mech, having faked his death earlier so he could charge his mech while Sonic fought the Deadly Six and now planned to conquer the remains of the world. Beating Eggman, Sonic apologized to Tails for doubting him as he returned the planet's energy, mending their friendship. As Eggman tried to escape, Sonic revealed he removed his jet pack's exhaust pipe, making Eggman fall down to earth. Returning to Knuckles and Amy with Tails, Sonic decided to take a nap to rest from his adventure.

In Sonic Forces, Sonic got a distress signal from Tails, citing that Eggman was attacking the City. After traveling through Green Hill, Sonic arrived in the nick of time to save Tails and some civilians from a squad of Egg Pawns that were about to shoot them. However, this time, Eggman was anticipating Sonic's arrival, and proceeded to unveil Shadow, Zavok, Chaos, and Metal Sonic, along with a foe named Infinite, Eggman's new right-hand man. Sonic, although surprised by the group's presence, nonetheless attempted to fight Infinite, only to get pummeled into defeat by him and his allies. Afterwards, Sonic got captured by Infinite and brought to the rebuilt Death Egg, where Eggman planned to banish him into space after having the hedgehog see his completed Eggman Empire. With Sonic out of sight, everyone believed him to be dead, and lost hope of a swift defeat of Eggman's forces.

Over the next six months, Sonic remained imprisoned onboard the Death Egg. In the meantime, the Eggman Empire conquered over 99% of the world, with its only opposition being the Resistance, led by Sonic's friends, with Knuckles as their commander. However, after the Resistance learned that Sonic was alive, Eggman was forced to push Sonic's execution ahead of schedule via Zavok. However, as Zavok was about to get him, a power surge caused by the Resistance after infiltrating the Death Egg allowed Sonic to escape his restraints and defeat Zavok, who vanished upon his defeat. Having no time to ponder about what happened though, Sonic searched for a way off the Death Egg. Eventually, Sonic found the Avatar, a rookie Resistance member who had come to free him, and saved him from some Egg Pawns. Joining up with the Avatar, the two of them fled back to their world in an Eggman Fleet space shuttle. Back home, Sonic was welcomed back by Knuckles, who, out of necessity, sent him and the Avatar to take down the Arsenal Pyramid, Eggman's main munitions factory that was situated in Green Hill. During their mission, Sonic quickly bonded with the Avatar.

Upon returning to HQ, Sonic learned that Infinite was on the move in Mystic Jungle, and that Silver was fighting him. Sonic, eager for a rematch and some payback against Infinite, rushed over to the site of the battle, where he saved Silver just before Infinite could kill him. Making it clear to Infinite that he was not afraid of him despite of what he might think, Sonic tried to make him tell him the source of his strange power in his usual cocky manner. Instead, Infinite proceeded to fight Sonic. Although Sonic managed to hold his own compared to before when he first faced Infinite in the City, he ultimately still lost to Infinite, who let him live due to viewing him as not being worth killing. After that, Sonic spent some time healing from his fight, leaving the Avatar to handle the next few missions. Eventually, the Avatar returned with Tails and Classic Sonic, and Sonic had a warm reunion with Tails. Although Tails brought the bad news that Eggman would have a plan for wiping out the Resistance ready in three days, Sonic was sure that they could stop it. Sonic soon after went to the City after learning that Shadow was leading Eggman troops into the City, including Death Egg Robots, with Sonic hoping to learn why Shadow went rogue. Upon confronting him, however, he was surprised to see Shadow vanish after he got attacked by another Shadow, the second one being the authentic Ultimate Life Form. He then learned from the real Shadow that the one who vanished was a fake Shadow, one of several replicas made by Infinite's powers over virtual reality, and that Eggman's familiar henchmen were also replicas. Although this meant that Eggman had an unlimited army of clones with powers equal to their templates at his disposal, Sonic was still certain there was a way to win.

After Infinite foiled Operation Big Wave, Sonic and the Resistance found it necessary to figure out Infinite's weakness, prompting Tails and Classic Sonic to go on a recon mission. Meanwhile, Sonic and the Avatar got sent to the City to stop a Metal Sonic replica assaulting the Red Gate Bridge. After clearing out a Death Egg Robot that ambushed them, the duo found the replica and took it out. Afterward, Sonic thanked the Avatar for their help with a fist bump. Returning to HQ, Sonic learned that Tails had discovered the secret to Infinite's power: the Phantom Ruby prototype, a gem with power over virtual reality that Infinite has been fused with. Because this gem required the Death Egg to supply it with the power needed for it to work, Sonic and the Resistance set up a plan to destroy the Death Egg. As a part of the plan, Sonic invaded Network Terminal in the Chemical Plant while the Avatar distracted Eggman's forces at Guardian Rock in Green Hill, and shut down the Death Egg's defenses from there. This allowed Classic Sonic to invade the Death Egg and destroy it.

With the Phantom Ruby seemingly out of commission, Sonic and the Resistance attacked Metropolis in an attempt to capture Eggman and end the war. When Sonic and Tails found Eggman with Orbot and Cubot however, the doctor called in Infinite, who still had his powers thanks to a backup power source underneath the Eggman Empire Fortress. On Eggman's order, Infinite opened a portal into Null Space, a close-up space designed to trap Sonic inside it forever. In the end, Sonic got sucked into null space, along with the Avatar when they tried to rescue him. However, the two were able to escape from null space using the Double Boost and rejoin the fight in Metropolis. Although the duo managed to track down Eggman and Infinite, the two villains promptly retreated to the Eggman Empire Fortress to begin Eggman's endgame, leaving Metropolis to be captured by the Resistance.

Having less than an hour left before Eggman's endgame, Sonic and the Resistance confronted the Eggman Army at the Eggman Empire Fortress in an attempt to reach and stop the Phantom Ruby's power source. During the fight, E-123 Omega came to the aid of Sonic and co. It was then that Eggman had Infinite execute his endgame; using his Phantom Ruby prototype's power, Infinite created a sun to drop on the Resistance. Thanks to the Avatar however, the sun was vanquished, thus allowing the Resistance to continue the fight. Sonic himself used this opportunity to confront Infinite while he was weak from creating the sun. When Infinite regained his full power however, the Avatar came to Sonic's aid, and together they beat Infinite, who vanished into thin air. Warned by Eggman that it was not over however, the duo then made their way to the Phantom Ruby's power source and destroyed it, seemingly winning the war. After rejoining their friends however, Eggman revealed that the power source was a decoy and that the real Phantom Ruby had been incorporated into his triumph card: the Death Egg Robot. This meant the Ruby had no weakness anymore. With the Eggman Army on the rise thanks to the Ruby, Sonic, Classic Sonic and the Avatar fought Eggman. Destroying the robot, the trio ensured the Resistance's victory over the Eggman Empire.

In the aftermath, Sonic bid farewell to Classic Sonic, whose return to his dimension was imminent with the Phantom Ruby now gone, although Sonic was sure they would meet again. Sonic then inspired the Resistance to set out to clean up the mess Eggman had left the world in. When the Resistance later disbanded, Sonic decided to head out in search of new adventures, although not before bidding farewell to the Avatar, who had decided to set out on their own.

In Team Sonic Racing, Sonic and his team received vaguely worded invitations to the Ultimate Test of Racing Skill. With their curiosity getting the better of them, Team Sonic made a beeline for the rendezvous, where they ran into Team Rose. Just as Sonic accepted Amy's offer to join Team Rose's picnic, a stranger approached, a Tanuki calling himself Dodon Pa. Introducing himself as the one who sent the invitation, Dodon Pa told Team Sonic that they would be racing as a team in the most advanced cars he could create in a Grand Prix that would test their limits. While Dodon Pa's vagueness rose suspicion, Sonic, who was curious about this whole competition, convinced his team to join the Grand Prix. As Team Sonic got ready to depart for the first race on Planet Wisp, Team Rose ended up coming along and joining the competition.

For the races, Sonic received the Blue Star to race in. Shortly after the Grand Prix began, Sonic quickly started to enjoy the competition. Even as Dodon Pa brought in more brutal challenges, Sonic gladly welcomed them. Not long after, Team Vector joined the Grand Prix. Just as the next race was about to begin, Sonic caught Amy talking to Vector about Dodon Pa, whom they did not trust. Wanting Amy to stay focused on racing, Sonic goaded her into challenging him on the racetrack. Soon after, Sonic met Silver, who had received an invitation to the Grand Prix as well. Seeing that Dodon Pa had managed to sent a message to the future, the group realized that their enigmatic host held a lot of power. Soon after, Dodon Pa took the racing challenges up a notch. While Amy disapproved of this, Sonic gladly accepted the challenge. Later, Sonic heard from Knuckles that Tails was being sneaky. Sonic subsequently confronted Tails with this, who admitted that he was working on something. Respecting Tails' privacy, Sonic told Tails to tell him about it when he was ready. Not long after, Dr. Eggman and his team joined the competition, along with Team Dark, prompting Sonic to trash-talk with Eggman, who insisted that he was just here to race.

During a race between Team Sonic and Team Dark, Sonic focused solely on Shadow as they raced neck-to-neck in their speed-type racecars. Just as Sonic was beginning to enjoy the competition however, Dr. Eggman intruded on the teams' race in order to compete against them on his own as a "special guest". After Eggman began gaining the lead, Sonic, his team and Team Dark all agreed to put their feud aside and work together to keep Eggman from winning the race. Thanks to Tails' quick thinking and his team's support, Sonic was able to pass Eggman alongside Shadow using a Slingshot maneuver. Sonic and Shadow would afterward pass the finish line while the other racers took care of Eggman with a combined Wisp power-up assault. However, Dodon Pa was too busy watching Eggman's beating to see which one between Sonic and Shadow crossed the finish line first. As such, the two hedgehog decided to have a rematch.

Sonic later agreed with Tails that Eggman appearing here could mean he was working with Dodon Pa since they could not figure out the Tanuki's motives for making them race. Suspecting that Shadow could know something since he could likely work with Eggman, Sonic confronted his arch-rival, who revealed that he was here to stop whatever plan Eggman was cooking up. However, their egos soon clashed, and Sonic and Shadow ended up challenging each other to a race. Afterward, they agreed that they had to watch out for both Dodon Pa and Eggman. Soon after, Sonic learned that Eggman and Dodon Pa were seemingly working together. Since they did not know what the pair was up to though, the heroes decided to keep racing for now. Later, after Sonic taunted Eggman when he lost a race, the doctor sent hundreds of Eggpawns after the racers. As Team Dark set out to slag the Eggpawns, Sonic competed with Shadow to see who could slag the most Eggpawns. Sonic and Amy would later talk about how crummy a racer Eggman was, before learning that Metal Sonic had joined Eggman's team. Sonic, however, was not worried about Metal Sonic's participation. When they later had to start a new race, Sonic tried trash talking with Silver, but to no avail.

After another race, Sonic saw the Chao spectators go amok after spotting someone, who turned out to be Zavok. Annoyed by Zavok's appearance, Sonic asked Eggman if he was with him. Although Eggman denied this, he quickly had Zavok join his team. Afterward, Knuckles wanted to make his move due to Zavok's arrival, but Sonic reminded him that they had no moves while remaining confident that they would be able to handle Zavok. Since new information had put Dodon Pa into a new perspective though, Tails reminded everyone that they had no idea who the bad guy was in all of this. Sonic, however, stood by that it was Eggman and that they should keep racing for now. Later, after it was revealed that Dodon Pa was a good guy and that he was using the Grand Prix to gather information for his corporation's Ultimate Energy Engine, which Dodon Pa wanted to use for philanthropic purposes, Sonic wanted to focus on the Grand Prix. However, Shadow reminded him that they still had Eggman to worry about.

Soon after, the heroes learned from Big that Eggman had kidnapped Dodon Pa and brought him to the Final Fortress. Wanting to rescue Dodon Pa, Sonic and co. went to the Final Fortress. There, Eggman had them compete in a number of races with Team Eggman and his army of Eggpawns in exchange for Dodon Pa, not knowing Eggman was using them to gather the Ultimate Team Energy needed to finish the Ultimate Energy Engine. Once the engine was complete, Eggman stole it from Dodon Pa and incorporated it into his Death Egg. Sonic and his crew subsequently faced the Death Egg, and Sonic managed to beat it in a race. However, the Death Egg soon after went crazy and drove into the Final Fortress's core. As the Final Fortress crashed, Sonic had his friends abandon their cars and evacuate, with the exception of Tails and Knuckles who decided to remain with Sonic and help him save Dodon Pa. Touched by his friends' devotion, Sonic saved Dodon Pa with the aid of his friends and reunited with the others down on the ground. Just as the Grand Prix seemed over since the cars had been destroyed when the Final Fortress crashed, Dodon Pa decided to give everyone new cars, thus allowing Sonic and his friends to race once more.

In Sonic Frontiers, Sonic explored the mysterious Starfall Islands along with Tails and Amy in order to investigate the disappearance of the Chaos Emeralds. But then things take a turn for the dramatic immediately; as they approach the islands, sudden trouble hits their plane, and they are all sucked into a wormhole. Sonic soon after finds himself separated from his friends, eventually awakening in a strange, digital world – Cyber Space - which has taken the form of Green Hill Zone. Miraculously, he manages to escape Cyber Space, finding himself all alone on Kronos Island, one of the Starfall Islands, which is full of ancient ruins where strange enemies roam, but his friends went missing. There, Sonic hears a mysterious digital voice, claiming that he has done the "impossible" by escaping Cyber Space and naming him "the Key". It gives a baffled Sonic some cryptic direction about how to save his friends: he must collect the Chaos Emeralds, destroy something called the "Titans" and "tear down the walls between dimensions". Deciding that this guidance is better than nothing, Sonic sets out on a journey to discover all the mysteries of the Starfall Islands, rescue his friends, and discover how it all ties together, which leads to Sonic becoming locked in a race against time to defeat Dr. Eggman... or so it seems.

Sonic explores Kronos Island, he learns that he must collect Portal Gears by defeating Guardian robots; these can be used to activate Portals to Cyber Space around the island. Completing the challenges within Cyber Space rewards Sonic with Vault Keys, which he needs to reclaim the Chaos Emeralds from strange devices. He also discovers that he can manipulate certain pieces of ancient technology, such as turning statues in order to open a path forward. Shortly after claiming the blue Chaos Emerald, Sonic finds Amy imprisoned in a container made from cyber energy. He uses Memory Tokens to destroy the container, absorbing the residual energy as Amy approaches him in a strange, almost ghostly state. Realizing that she is still partially trapped in Cyber Space, Sonic resolves to free her entirely as he continues exploring the island, battling enemies and collecting more items; unbeknownst to him, this exchange has been witnessed by a mysterious girl with a similarly "glitched" appearance as Amy.

After claiming the red Chaos Emerald, Sonic is intercepted by the mysterious girl and an enormous robot. The girl uses a strange red light to put the robot in a dormant state and demands Sonic to leave immediately, warning him "do not approach the Titan." When Sonic ignores the warning, the girl reactivates the massive robot, which soundly defeats Sonic and throws him across the island. After recovering from the impact, Sonic concludes that he can only beat the Titans by using the Chaos Emeralds to attain his super form. Back on Kronos Island, Sonic finds Amy accompanying a Koco trying to find their one true love. Amy explains that she can understand the Koco because the digital dimension she is stuck in is translating for her. At her urging, Sonic assists her in searching the island, finding other Koco to help along the way; this also allows Sonic to acquire the green and light blue Chaos Emeralds. The hedgehogs notice that helped Koco become inanimate, emitting energy that illuminates a strange glyph in the sky; after helping the first Koco, Sonic and Amy are suddenly transported into a memory of the past, where they discover that the Koco possess the spirits of those who came before. Afterwards, Amy expresses a desire to help others with her love, even though this means that she will have to spend time away from Sonic.

After finding six of the Chaos Emeralds, Sonic opens the path to the Titan he saw earlier - the fearsome Giganto. Unable to directly challenge the behemoth, he scales its body to find the final Chaos Emerald in a device on its head. With the final Emerald in hand, Sonic transforms into Super Sonic, finally allowing him to battle Giganto head-on; after a fierce battle, he destroys the Titan by charging straight through its chest. When Giganto explodes, Super Sonic receives a brief vision of an Ancient shouting "No! We'll find another way!" Shaking off the strange experience, he hears the mysterious voice inform him that the first seal is broken and that his next target is on "the sand-scarred island." Amy tells Super Sonic that she feels more like her old self now, although she still seems to be half-trapped in Cyber Space; deducing that he needs to defeat all of the Titans to save her and Tails, Super Sonic takes off for Ares Island.

As Sonic approaches his destination of Ares Island, he's hit by a laser beam that knocks him back to his base form; to his further annoyance, the emeralds promptly scatter across the new island. As he sets out in search of the gems, Sonic discovers Knuckles trapped in the same sort of prison that held Amy. Upon rescuing him, Sonic asks what Knuckles is doing so far away from home; Knuckles explains that he was exploring some of the ruins when he was transported into the island and then trapped. Sonic asks Knuckles to help him search for the Chaos Emeralds so they can go home. Further into the island, Sonic encounters the draconic Titan known as Wyvern. It ignores Sonic until Sage appears, stating that she cannot fully control the Titan, but she can make it aggressive towards Sonic. The hedgehog is forced to escape from Wyvern's missile barrage, which Sage identifies as his "last warning" to leave - Sonic simply scoffs at the mysterious girl's apparent concept of "warning" people away. Later on, Sage tries to attack Sonic directly, only for Knuckles to jump in and block her laser blast. However, Sonic refuses to attack Sage, realizing that she is trying to protect "something... or someone" from him; Sage seems shaken, but refuses to elaborate as she vanishes once more.

As the search for the Chaos Emeralds continues, Sonic and Knuckles assist a group of Koco soldiers that were separated from their commander; this eventually leads them to witness a memory of a battle between the Ancients and an unknown enemy. Another troop of Koco are taking refuge in a temple that reminds Knuckles of the ruins on Angel Island, making him wonder if the Ancients are related to his own tribe's past. After Sonic helps him defend the temple from incoming Guardians, Knuckles admits that he envies Sonic's free-living ways and resolves to explore the world himself once he's returned to normal. After claiming six of the Chaos Emeralds, Sonic makes his way to Wyvern, suspecting that the Titan is holding on to the last gemstone in an effort to stop him from going Super. After a dynamic ascent and aerial pursuit, he reaches Wyvern's head and becomes Super Sonic once more to engage the Titan in battle. Destroying Wyvern gives him another vision of an Ancient; this one is lamenting on the unexpected demise of a comrade. Rendezvousing with Knuckles, who brags that he would've beaten Wyvern sooner if he were able to go Super, Super Sonic tells him that he has one more Titan to defeat so they can all return back to normal; he expresses worry for the missing Tails, but Knuckles assures him that the fox will be alright.

Sonic in his super form, flies to Chaos Island, only to be shot down and de-powered once more. As he begins exploring the new location, he discovers Tails trapped in a Cyber Energy sphere and frees him; this time, however, absorbing the dispersed cyber energy leaves him visibly strained. Tails becomes concerned about Sonic's condition, which an observing Sage describes as "cyber-corruption", but Sonic forces the energy down and tells Tails that he is fine; moreover, he needs this power to rescue him and his friends. Tails offers his help and Sonic asks him to track the chaos emeralds for him; the fox has barely left before his friend staggers, clearly less well than he claims to be. Shortly after claiming the first Chaos Emerald, Sonic is confronted by Sage and the local Titan, a massive four-legged humanoid called Knight. Unlike previous encounters, Sage seems quietly interested in what Sonic intends to do against this new foe; after Sonic evades its assault with the help of a passing Squid, she deems his efforts "within parameters" before teleporting away.

Scouting the island, Sonic and Tails realize that it was formerly one of the Ancients' military bases, dotted with cannons that Tails likens to the Eclipse Cannon, but as free-standing turrets far more advanced and efficient than the Space Colony ARK's main weapon. They eventually find an environmental analyzer that networked the Ancients' technology to Cyber Space. Activating the device transports Sonic and Tails to Cyber Space, where they see the Ancients' weapon emplacements attacking an unknown enemy in the sky, only to be destroyed by a barrage of even stronger beams. Tails comments that whatever enemy the Ancients were fighting had power equal to Dark Gaia; a theory further supported when he and Sonic find the scrapped remains of a Death Egg Robot on the island, whose laser weapon they use to advance. As Sonic continues finding Chaos Emeralds and assists a Koco engineer in collecting machine parts for one of the Ancients' cannons, Tails expresses his concerns that he's slowing his friends down, citing his repeated incidents of cowardice or otherwise requiring Sonic's help. Sonic counters by recalling all of Tails' feats; when this doesn't fully break his friend's funk, he admits that self-doubt is a part of growing up and reassures Tails that he believes in his capabilities. Reflecting on this, Tails resolves to strike out on his own and prove that he can be a hero just like Sonic; the latter is surprised but moved, commenting that Tails has grown on him even faster than he expected.

Later, Sage appears in front of Sonic and asks him if he can trust the voice that is leading him, raising the possibility that it is leading him to disaster. Sonic says he will simply stop them if that is the case, which seems to confuse Sage; she then confronts Tails while Sonic is elsewhere, asking him why he believes in his friend despite the odds. Tails admits that Sonic isn't perfect, but asserts that he will always come through in the end; he cites the hedgehog's numerous past triumphs, which Sage admits is "empirical data" to support the point. With six Chaos Emeralds in hand, Sonic infiltrates a large volcano on Chaos Island, using an Ancient device oddly resembling a pinball machine to create a lava flow that disperses the clouds concealing Knight's lair. Confronting the Titan as he did Giganto and Wyvern, he claims the last Chaos Emerald from its head and defeats it as Super Sonic; afterwards, he sees a memory of an Ancient committing to an unknown plan. The disembodied voice tells him that the final lock has been revealed; he has to shut down the towers located on Rhea Island.

Reverting to his normal state, Sonic makes his way to Rhea Island, where he finds six massive towers emitting cyber energy. He scales each tower to shut them down, absorbing even more cyber energy in the process; Sage is both concerned and bewildered by his continued persistence as his condition rapidly worsens. Furthermore, each tower gives Sonic a vision of the Ancients' history, revealing that they once inhabited a distant world which was destroyed by an unknown threat. They escaped the apocalypse with ships powered by the Chaos Emeralds, only to land on Earth when their energies reacted with the Master Emerald on the planet. The destroyer of their world eventually found them on Earth, prompting them to use the Titans against it while evacuating a few Ancients to the resting place of the Master Emerald. The visions Sonic had after defeating each Titan were from their final battle against the mysterious enemy; with no other options, the leader of the squad, piloting a fourth, unknown Titan, sacrificed their life to seal the foe within their mech; in turn, the other three Titans trapped it in Cyber Space to ensure that it could no longer threaten Earth.

Unfortunately for Sonic, this last revelation comes after he shuts down the final tower, fully corrupting himself with cyber energy as everyone trapped in Cyber Space, including Eggman, is released. Tails realizes that Sonic is now trapped between realities as the mysterious voice reveals its true colors; it is the enemy that the Ancients sealed away, and now it's free to resume its destructive ways! Sonic's friends decide to sacrifice their physical forms to restore Sonic, sending them back into Cyber Space as he returns to normal; Sage desperately requests that Eggman forms an alliance with Sonic, which he reluctantly agrees to. After hastily making Sonic a member of the Eggman Empire, as a thinly-veiled effort to salvage his pride, Eggman tasks Sage with helping him find the Chaos Emeralds on Ouranos Island.

Sonic promptly begins his own hunt for the Emeralds, occasionally conversing with Sage along the way. After finding the sixth Emerald in a massive temple, Sonic meets up with Eggman and Sage, who have found the final emerald themselves. After Eggman tosses Sonic the final chaos emerald, he transforms into Super Sonic and fights Supreme, the final Titan which serves as their mysterious enemy's final prison. When Supreme is defeated, the entity escapes to space; noting that it's too powerful for even Super Sonic, Sage realizes that she must "leave" Eggman to help the hedgehog. Eggman somberly orders her to "fulfill her function," quietly referring to Sage as his "dear daughter" as she merges with Supreme and joins Sonic in flying to space. Beyond earth's orbit, the entity manifests its true form, introducing itself as The End. Sonic and Sage battle it with Supreme's power, undeterred by The End's fierce barrages and repeated insistence that it is utterly beyond anyone's ability to defeat. At last, the heroes block The End's final energy beam before Supreme hurls Super Sonic at their foe; accelerating to his limit, Sonic then dashes towards it and smashes right through the entity and inflicts critical damage, killing it. However, The End, after being destroyed falls in an attempt to blow itself up with enough force to take the earth with it; in desperation, Sage flies Supreme into The End to contain its explosion. The resulting blast is still powerful enough to send Super Sonic back to earth, with Sage asking him to "protect... Father" with her last words.

As a meteor shower begins over the Starfall Islands, Sonic's friends are released from Cyber Space once and for all, having a joyous reunion with Sonic as he returns from space safe and sound. Later, everyone is preparing to leave as Sonic sarcastically jokes about how fun the adventure was, to the dismay of his friends. Tails claims that Sonic will barely recognize him once they meet each other again; Amy wonders if Cream the Rabbit and Sticks the Badger are free for a road trip; Knuckles says that it'll be good to get back to his island, at least for a while. With their plans for the future set, Sonic jumps aboard the Tornado and sets off for home along with his friends.

In Sonic Superstars, at some point before the Chaos incident, Sonic joined Tails, in an adventure to the mystical Northstar Islands to defeat Dr. Eggman, who had teamed up with Fang the Hunter and a mysterious girl named Trip the Sungazer to turn the islands' inhabitants into Badniks. Later in Pinball Carnival Zone Sonic and Tails would join Amy and Knuckles. Later through their adventure in Golden Capital Zone which they would learn of Trip the Sungazer and her Dragon form they would proceed through Frozen Base Zone to build egg mobiles to fly up to Egg Fortress Zone which Sonic and pals defeat Eggman while Trip defeats Fang. Once on the surface they drop Knuckles off and the Black Dragon is unsealed and with the Chaos Emeralds, Super Sonic defeats it with the heroes returning home with another victory while Trip remained on the Northstar Islands.

In Sonic Dream Team, sometime after the events of the Starfall Islands Incident, Rouge receives intel that Cream the Rabbit along with Cheese has been captured by Eggman. Eggman using their dreams to his gain, they are put to sleep and wakes up in Scrambled Shores place in the Dreamscape. the heroes would meet Ariem and would help free Amy, Tails, Knuckles and Rouge. later they would have a final showdown versus Nightmare Eggman which soon after despite saving the day Ariem would have to go in to her Dormancy Protocol.

In Chao In Space, as Christmas was approaching, Sonic was taking a nap with some Chao at the Neutral Garden. He soon after noticed a sleepwalker Neutral Chao walk towards a swimming pool, so he guided them away from it. However, the little creature continued to go away, this time climbing a small hill and about to fall apart. The hedgehog saw this and rushed to save them, but they flied away at the last second and left him to fall into a pool, floating slightly annoyed.

As the sleepwalker Chao continued to escape, Sonic was busy trying to ensure their safety as other Chao watched. Unbeknownst to them, however, Dr. Eggman, disguised as Santa Claus, was climbing to the Neutral Garden to steal the presents there. The hedgehog then noticed the Neutral Chao flop onto the ground with a sad face, before waking up and seemingly aimlessly running towards the doctor, giving him a powerful punch in the face that sent him plummeting into the sky. Sonic caught the Chao before they fell too and saw his adversary defeated, initially confused but nevertheless satisfied.

In the aftermath, the still-sleepwalking Chao began pulling Sonic's nose. Much to the hedgehog's dismay, they got it off, causing him to scream in pain. He afterwards tied them to a tree and fell asleep next to them, his injured nose being covered in a bandage.

In Sega Superstars Tennis, Sonic is a playable character that is available from the beginning of the game.

In Sonic & Sega All-Stars Racing, Sonic appears as one of the playable characters. In this game, he is available from the beginning. For the racing in this game, he is driving a vehicle built for him by Tails from parts found after an attempted invasion by Dr. Eggman: a blue convertible with spikes resembling quills named the Speed Star.

In gameplay, Sonic has high acceleration and turbo-boost, and balanced speed and maneuverability. His All-Star Move, "Super Sonic", lets him transform into Super Sonic, who can boost down the track and flips over any character he comes close to.

In Sonic & All-Stars Racing Transformed, Sonic once again appears as one of the playable characters. In this game, he is available from the beginning of the game. For the racing in this game, he is driving a remodeled Speed Star, which can transform into a boat, a plane, or a car, depending on the surrounding terrain.

In gameplay, Sonic has maximum speed, lower-than average acceleration and boost, and slightly-above average handling. His All-Star Move lets him hit other racers with the Light Speed Attack while racing from midair. Sonic also appears as an icon on the game's "Sonic Drift" Sticker.

In Sonic Jump (2012), Sonic and his friends discovered that Eggman had begun kidnapping Animals again and taking them high into the sky, prompting the heroes to set out to stop Dr. Eggman's operations. Whenever they managed to corner Eggman in a Zone and defeat him however, the doctor would retreat to another Zone, although not before capturing more Animals. After Eggman's defeat in Mechanical Zone however, the doctor would crash down to earth, ending his plans, thus allowing Sonic to reunite with all the Animals.

In Sonic Jump 2, Sonic appears as the only playable character.

In Sonic Jump Fever, Sonic appears as a playable character. In this game, he is the only character who is available from the beginning of the game. In gameplay, Sonic's speed and agility allow him to progress up the levels faster than any other character The power-ups he can utilize in this game include the Shield, Stun, Spring Shoes and Detonate.

Sonic also appears on the game's preset leaderboards, placing first in each Zone. When playing a Zone, a destructible monitor containing Sonic's portrait will appear if his score has been passed.

In Sonic Runners Adventure, Sonic received a transmission from Tails, telling him to come to South Island as Dr. Eggman was up to his old tricks again by kidnapping Animals. After asking around and following some clues while messing up Eggman's operations, Sonic found Tails in Eggman's facility. There, Tails told him that the doctor somehow caught him and made him build a robot teleporter. Sonic subsequently tracked down Eggman and beat him. Although Eggman then escaped through Tails' teleporter, Sonic and Tails followed him through it. However, Sonic got injured during the transfer, and had to rest while Tails went after Eggman on his own. Rejoining Tails later on, the two resumed their hunt for Eggman.

With Knuckles coming along, Sonic and Tails let the echidna take the lead when they arrived in more hostile surroundings. Along the way, Knuckles took out Eggman's newest Extractor. Sonic and his team would then follow Eggman to Sky Sanctuary. When Sonic was forced to let Eggman go by the doctor's Mind Control Ray, Team Sonic realized what Eggman's plan was all along: setting up a new mind control canon powered by the Extractor and Sky Sanctuary to take over the world with. Resolving to stop Eggman's weapon, Team Sonic destroyed the mind control cannon, leaving only Sonic to defeat Eggman for good. Retreating, Eggman vowed revenge, but Sonic promised that he and the others would be ready when the time came.

In the Wii version and Nintendo DS version of Mario & Sonic at the Olympic Games, Sonic appears as one of the playable characters.

In the Mission Mode in both the Wii and Nintendo DS versions of the game, Sonic has to beat a set of five missions, which will unlock a final mission. Clearing all six missions will award the player with the Sonic Emblem.

In both the Wii and Nintendo DS versions of the game, the player can also earn the Sonic Crown by getting all gold and 1st medals using Sonic.

In the Wii version and Nintendo DS version of Mario & Sonic at the Olympic Winter Games, Sonic appears as a playable character. In the Wii and Nintendo DS version, Sonic also has the special skill, the Spin Dash, which he can use in certain events to gain speed. It is also the second game to feature Sonic and his cast compete in the Olympics with Mario and his cast.

In both versions of the game, Sonic has the following characteristics and icons

In the Wii version of the game, a Mii costume based on Sonic can be unlocked in the game after winning five gold or/and 1st place medals in any Olympic/Dream Events with Sonic and then buying the costume in the boutique.

In Adventure Tours mode in the Nintendo DS version of the game, Sonic is one of the mode's two protagonists, along with Mario. Over the course of the plot, Sonic is a silent protagonist; he has no dialogue of his own, and only makes short noises that express his emotions, just like Mario. In Adventure Tours mode, the player can control Sonic while navigating the map and switch between him and Mario at anytime. Sonic in particular can jump on Springs and knock down bridges and destroy cracked walls with the Spin Dash and Homing Attack to create passages. Sonic is as well as one of the first two characters to be selectable in events, along with Mario. During the events of Adventure Tours mode, Sonic and Mario learned that Dr. Eggman and Bowserhad kidnapped the Snow Spirits and caused the snow to melt, thus disrupting the Olympic Games. Soon after, they united and embarked on a journey through the different lands of the Olympic park. On the way, they met their many friends and enemies, and saved the individual Snow Sprites. At the end of the plot, Sonic and Mario defeated Dr. Eggman and Bowser, and finally brought the snow back, thus allowing the Olympic Games to go on. After completing the main plot, the heroes can also complete the challenges that Metal Sonic and Bowser Jr. have left for them. After beating the challenges Metal Sonic and Bowser Jr. decide to follow Mario and Sonic around to get better which the hero's seem ok with. After beating Eggman and Bowser for the second time, they decide to follow Mario and Sonic as well to improve their skills causing the heroes to let their arch-enemies join.

In the Wii version and Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games, Sonic appears as one of the playable characters. In the Wii version, Sonic also has the special skill, the Spin Dash, which he can use in certain events to gain speed. It is also the third time Sonic and his team took part in the Olympics Games with Mario and his team.

In this game, across both versions, Sonic has the following characteristics and icons:

In the Wii version of the game, a Mii costume based on Sonic can be unlocked in the game by either winning it through a Scratch Card or paying ten blank cards.

In the Nintendo 3DS version of the game, Sonic belongs to the Heroes class and can only take part in sports events selected for this class. Sonic and Mario also return as protagonists in the game's story mode. Like in the previous title, they both have no dialogues, only speaking using singular noises to express their emotions. During the events of the mode, Sonic and Tails arrived in London for the Olympic Games, only to find a colored fog enveloping the city. While they were sightseeing around London, Sonic and Tails came across Fog Imposters of Mario and Luigi, whom they defeated. Afterwards, they saw the imposers fade away. Overhearing then a Boo talk about how everything was going as planned, Sonic and Tails followed it to the Tower of London. There, the duo overheard the Boo talk with King Boo about the Phantasmal Fog infesting London. From them, Sonic and Tails learned that the fog was able to create imposters of their friends. Upon noticing them however, the Boos challenged Sonic and Tails to an event. After defeating the Boos, Sonic destroyed the local Fog Machine spreading the fog, thus clearing the area of the fog. The duo tried the next day to cross the London Bridge, but it was impossible to cross due to the fog in the area. There, they met Yoshi and defeated Fog imposters of Shadow and Silver. Shortly after the real Shadow and Silver arrived though, the heroes passed Jet. Sonic, Shadow and Silver managed to stop him though, and they had him take them to the local Fog Machine. This was where Sonic allowed Shadow, Silver, and Yoshi to defeat Bowser Jr., who got in their way. Shadow then destroyed the Fog Machine, clearing the fog and allowing the bridge to be lowered. From Bowser Jr., the heroes learned Bowser was working with Dr. Eggman again. Sonic and Tails then split up from Shadow, Silver and Jet, and headed to the British Museum to discover the truth behind the mysterious fog. On their way to the museum, they met Mario, Luigi and Toad, with whom they joined forces with to destroy the remaining Fog Machines. They soon after managed to clear the grounds of the British Museum by defeating Eggman Nega and destroying his Fog Machine. In the museum, the heroes discovered that the fog came from an Fog urn in which the Phantasmal Fog was sealed up in. Now, however, it was being used by Dr. Eggman and Bowser. When Charmy Bee then returned from some reconnaissance, Sonic and his friends decided to split up and find the bad guys and their Fog Machines in different parts of the city. Sonic eventually met Knucklesand Vector at Horse Guards Parade, who defeated Bowser for him and destroyed the local Fog Machine. Sonic then left Bowser in their hands and returned to the stadium, with the fog having been removed from everywhere around London, where he told his friends about everything.

Some time later, the fog returned, this time spreading over all of London with increased intensity. Sonic, Tails, Mario and Luigi later rescued Cream and Cheese from their fog imposters at the stadium. Afterward, the group and Omega traveled to Stonehenge to follow a clue from an amnesiac Omega, where Sonic defeated Magikoopa. There, the heroes found the lid for the Fog urn, which they took with them. Omega, who had regained his memory files, also informed them that Eggman and Bowser had set up their base inside Big Ben. The heroes subsequently went there while defeating more Fog Imposters, but Toad could not go any further, so he was taken away by Omega. Sonic, Tails, Mario, and Luigi then traveled to Big Ben, where they faced Eggman and Bowser, who were empowered by the Phantasmal Fog. However, Sonic and Mario managed to win the clash. Sonic and Mario then destroyed the Master Fog Machine, returned the Phantasmal Fog to its urn and sealed it. After the fog was gone, Eggman and Bowser explained that they wanted revenge for not being invited to the Olympic Games. It turned out, however, that their invitations had been lost, but they could still take part in the competition if they signed up in time. Soon after, Sonic and Mario performed at the opening ceremony for the Olympic Games.

In the Nintendo 3DS version of the game, a badge of Sonic can also be obtained from the badge machine.

In Mario & Sonic at the Sochi 2014 Olympic Winter Games, Sonic appears as one of the playable characters. In this game, Sonic has the special skill, the Spin Dash, which he can use in certain events to gain speed. It is also the fourth time Sonic and his team took part in the Olympics Games with Mario and his team.

In Legends Showdown, Sonic is on the first team, along with Tails, Yoshi, and Donkey Kong. Also, a Mii costume based on Sonic can be unlocked in the game by completing the last area in Legends Showdown.

In the Wii U version, Nintendo 3DS version and arcade version of Mario & Sonic at the Rio 2016 Olympic Games, Sonic appears as a playable character. It is also the fifth game to feature Sonic and his cast competing in the Olympics with Mario and his cast.

In the Wii U version of the game, Sonic is available from the beginning and playable in all events. Also, a Mii costume set based on Sonic can be unlocked in the game by completing Sonic's Carnival Challenge. However, it must be collected in two separate parts, each with their own stat changes.

In the Wii U version of the game, Sonic has the following characteristics, description and icons

In Road to Rio Mode in the Nintendo 3DS version of the game, Sonic has his own gym, which the Mii can choose from to prepare for the Olympics. During the events of the game, Sonic and Mario disappeared after their Olympic medals went missing from the museum and their gyms were accused of having stolen them, creating a disagreement between the gyms. In truth though, Sonic and Mario went into hiding to investigate the thefts. With the help of the Mii, however, the heroes discovered that Dr. Eggman and Bowser were behind everything, whom they eventually defeated and recovered the stolen medals from. Unlike the previous times, Sonic is not a silent protagonist like Mario.

In the Nintendo Switch version and arcade versionof Mario & Sonic at the Olympic Games Tokyo 2020, Sonic appears as a playable character. It is also the sixth game to feature Sonic and his cast compete in the Olympics with Mario and his cast.

In the Nintendo Switch version of the game, Sonic also appears as one of the protagonists in the story mode alongside Mario (and like the Nintendo 3DS Road to Rio Mode, he is no longer a silent protagonist, which enables him to speak for Mario along with Toad). In this mode, Sonic and Mario showed up for the Olympic Games where Toad brought them a gaming system called "Tokyo '64" addressed to them from an anonymous sender. As Sonic got suspicious, Luigi showed up. Not long after, Bowser, with Dr. Eggman close by, showed up, causing Luigi to get frightened and drop the Tokyo '64 he was holding and turn it on, causing Sonic, Mario, Eggman, Bowser and Toad to get sucked into the Tokyo '64. Inside the heavily pixelated world of the Tokyo '64, Sonic, Mario and Toad learned that the Tokyo '64 was a trap made by Eggman and Bowser, but it had backfired by sucking the villains in too. Although Eggman claimed there was no way out, he convinced Bowser to compete in the Olympic Games featured inside the Tokyo '64 so they could win gold medals, prompting Sonic and Mario to follow them and compete in the digital Olympic Games too.

After Sonic beat Eggman, Mario beat Bowser in the next event. Afterward, Sonic and Mario heard from Toad, who had head from Eggman that to escape the Tokyo '64, they had to collect gold medals. As the heroes tried to confront the villains though, Sonic and Mario discovered Eggman and Bowser had snuck away. Thankfully, a Pecky told Toad that Eggman flew out west, so Sonic decided to chase him, while Mario and Toad looked for Bowser. Sonic tried to find Eggman, but to no avail. Reuniting with Mario and Toad, the heroes reported that their foes had gotten away and were probably meeting somewhere. Eventually finding Eggman and Bowser in the Tokyo Metropolitan Gymnasium, Sonic and Mario came face-to-face with the villains. After Toad made Eggman admit that there was a way out of the Tokyo '64, Sonic told him and Bowser that they that would not get away with the gold medals. Mario proceeded to challenge Eggman, which he won. Later, Sonic tried to eavesdrop on another of Eggman and Bowser's conversations about the medals, only for Eggman to say they were discussing strategies. Not buying this, Sonic left the gymnasium with Mario and trailed the villains to Nippon Budokan where Bowser was preparing for another event. After Sonic beat Bowser, the villains split up to devise a new plan in an undisclosed location, although not before Bowser teased the heroes by telling them that the medals will not be enough to get them out. Suspicious, Sonic decided to find the Eggman and Bowser's secret place. Nearby at the Tokyo Roads, the two heroes reunited with Toad, who saw someone who looked like Eggman going off in a taxi. With his speed, Sonic caught up to the taxi. However, the heroes discovered that "Eggman" was actually a Picky impersonating him. However, after the Picky mentioned a big flame, the heroes realized they could find Eggman and Bowser at the Olympic Cauldron in the National Stadium. There, they decided to stay back and figure out what they were up to.

Eventually, Sonic, Mario, and Toad heard Eggman say that by inserting fourteen gold medals into fourteen keyholes underneath the Olympic Cauldron, they could return to the real world. However, Eggman and Bowser soon noticed Sonic and Mario eavesdropping nearby, prompting them to hurry out and get more medals. Sonic and Mario pursued them to the National Gymnasium, where Sonic beat Eggman in another event. Soon after though, a screen that said that "Power-up Items" from Eggman Nega were on the way appeared. As mysterious items fell all over the digital world, Eggman and Bowser hurried out to get them and use them to win medals. Knowing they would be at a disadvantage against Eggman and Bowser if they got those power-ups, Sonic and Mario left to stop them. In the Tokorozawa Shooting Range, they found Eggman, who used a "Miracle Roll" power-up to amplify his skills. Regardless, Mario beat Eggman. Seeking more Miracle Rolls, Eggman left the scene, prompting Sonic and Mario to follow him. With Toad's aid, they found a Miracle Roll on top of Tokyo Tower, which they worked together on to keep from Eggman and his Badniksusing the Tornado. Afterward, Sonic and Mario hurried out to stop Eggman and his Badniks from finding more Miracle Rolls. They later came across the Museum, which held a Miracle Roll, but was under lockdown by Bowser's minions to ensure no one but Bowser could get his hands on it. After Mario acquired the Miracle Roll himself, he ended up showing Sonic that it had no effect him. Regardless, the heroes decided to keep the villains from getting more of them.

Finding Bowser at Lake Sagami, Sonic beat Bowser in an event, even after Bowser ate two Miracle Rolls. Afterward, Bowser left to find Eggman. Eventually, Sonic and Mario found Eggman and Bowser at the National Stadium. There, Eggman answered Mario's challenge to test their power, only to lose. Despite the heroes' victory however, Eggman noted that he could just call Eggman Nega for more power-ups. When he did however, everything around them began flickering, which was a sign that the Tokyo '64 was running out of battery. Sonic wondered what it would mean for them if the battery ran out, to which Eggman said that they would all vanish. This eventually prompted Bowser to challenge Sonic and Mario to another event. Having no choice, Sonic and Mario accepted the challenge. At the Komazawa Olympic Park General Sports Ground, Sonic and his team of Pockies beat Eggman and his team of Eggrobos. Afterward, Sonic and Mario met Eggman's challenge in the final event in the National Stadium. Knowing the villains would play dirty, Sonic and Mario gave their medals to Toad for safekeeping. When Mario later beat Bowser, Bowser knocked out Sonic and Mario and tried to take their medals, only to discover that they were gone. While Dr. Eggman tried to come up with a new plan, Sonic reminded them that they did not have much time left and that they should team up to get out. Eventually, Eggman and Bowser agreed to a truce. The group thus went to the Olympic Cauldron and placed the gold medals into the keyholes. Soon after, a column of light appeared to take them back to the real world. While this was happening however, everything around them began to flicker again, signifying that the battery had run out. The group subsequently began to fade away while unable to reach the escape route. Fortunately, they were saved in the last second when Tails and Luigi replaced the battery on the Tokyo '64. Now restored, Sonic and the others reached the exit and returned to the real world.

As they readjusted from being inside the Tokyo '64, Sonic and Mario were approached by Eggman and Bowser, who wanted to settle the score with the two heroes in a 100m event. Accepting the challenge, Sonic got Shadow to join the event, with others joining as well. After the heroes won the match, the Olympic Games were ready to commence. In the aftermath, Sonic and Mario would resume playing Tokyo '64 now that they could come and go as they please, with Eggman and Bowser joining them for rematches.

In the Nintendo Switch version of the game, Sonic is playable in both the 2020 and the 1964 events, the latter in which Sonic possesses his sprite-based appearance from the original Sonic the Hedgehog, and has the following characteristics:

In the arcade version of the game, Sonic is playable in both the 2020 and the 1964 events, the latter in which Sonic also possesses his sprite-based appearance from the original Sonic the Hedgehog, and has the following characteristics and icons:

In Super Smash Bros. Brawl, Sonic appears as one of the playable characters. He is also the second third-party character to join, behind Solid Snakefrom the Metal Gear series.

In the "Sonic Joins The Brawl" trailer, Sonic can be seen fighting the Subspace Army with Mario. Oddly, this never happens in the actual storyline; it is only possible to play as Sonic and Mario if one replays a level with Sonic and Mario. Sonic only appears in the Subspace Emissary once, when he attacks Tabuu, the leader of the Subspace Army and weakens him. This is most likely due to Sonic's late inclusion in the game and most of the Subspace Emissary being completed at that time.

In gameplay, Sonic is a middleweight character with the fastest dashing speed in the game, as well as among the fastest walking and air speeds, which are only boosted farther by his Spin Dashand Spin Charge maneuvers that lets him rip across the stages while attacking and/or jumping. His Spin Attack-base maneuvers gives him as well a variety of ways to attack and confound his opponent, while also aiding Sonic's ability to time out opponents. Additionally, Sonic has one of the best recoveries in the game and an effective grab and throw game, and generally great damage racking abilities from his Spin Attack-based maneuvers, up throw, and effective combos. However, he is also one of the weaker characters in the game and has few KO options. Excluding his special moves, Sonic has weak attacks that either has little utility or are outmatched by other characters' moves. While Sonic's forward smash and back air are reasonably strong, they have low reach, which together with other factors, give him a rather linear approach.

In the Adventure Mode, The Subspace Emissary, when the heroes got through the Great maze and confronted the final boss Tabuu, Tabuu prepared to turn everyone into trophies when a blue blur came out of nowhere and broke Tabuu's wings. The blur landed on a mountain, revealing himself as Sonic. Sonic taunted Tabuu and helped the heroes defeat him, restoring the World of Trophies back to normal. After Tabbu's defeat they are all seen standing proudly on the cliff at the end after saving their world from being assimilated into Subspace.

Sonic also appears in the game as one of the trophies and two Stickers

In Super Smash Bros. for Nintendo 3DS and Wii U, Sonic made his second appearance as a playable fighter in the Super Smash Bros. series, making him the first third-party veteran in the series. In both versions of this game, Sonic is a starter character, making him available from the beginning.

In gameplay, Sonic is a middleweight character, who, in comparison to Sonic's appearance in the previous game, has received a noteworthy improvement in his combat skills. In addition to boasting the fastest dashing speed in the game and having an increased air and falling speed, his special moves allow him to attack while in motion with little fear of reprisal. Most of Sonic's attacks and moves have also received an improvement in utility, most notably in regards to his KO potential. However, Sonic's options for KOs are hindered by a noteworthy lag effect, which makes them risky to use, while also impairing his ability to achieve KOs outside of the neutral game. Also, in regards to him mobility. Sonic's linear recovery makes him an easy target for gimping as well. In addition, in comparison to other characters, Sonic has trouble handling projectile camping due to his lack of reliable projectiles to use for this technique and his ability to neutralize them.

Each version of the game also comes with their own Trophies of Sonic:

In Super Smash Bros. Ultimate, Sonic made his third appearance as a playable fighter in the Super Smash Bros. series.

In gameplay, Sonic is a middleweight character. In this title, he was slightly weakened in comparison to the previous title in exchange for a more aggressive playstyle. His Spin Dash and Spin Charge moves had a few mechanics removed, and his Up aerial's angle and knockback adjustments have lessened its hits' consistency when Sonic is ascending and its potential to score a KO despite remaining a useful set-offs for combos this time. In return, Sonic's Homing Attack is faster and more controllable, the consistency of his Spin Charge move has been improved significantly, and his Spring Jump is more useful for recoveries than in the early title. In addition, many of Sonic's standard attacks have been strengthened or received greater utility. Many of the game's gameplay changes have also worked in Sonic's favor in terms of combat and recovery.

In the Adventure Mode of the game, "World of Light", Sonic was one of the many fighters that stood up to the threat of Galeem and his army of Master Hands. When Galeem began capturing the fighters, Sonic tried to rescue Pikachu but failed as they were both engulfed by the light rays. Thus, the fighters (aside from Kirby, who had managed to escape) were held captive by Galeem so that he could clone them and create puppet fighters for evil spirits to control. During the Adventure Mode, several puppet fighters of Sonic are used for spirit battles. An evil version of Sonic can be fought and defeated in the Dark Realm so that the true Sonic can be awoken and join the fight to defeat Galeem and later Dharkon.

In Sonic Chronicles: The Dark Brotherhood, Sonic, Tails, Knuckles and Amy were facing Dr. Eggmanonboard the Egg Carrier. Together, they succeeded in making the Egg Carrier crash into Metropolisand Eggman was presumed dead.

With no need to be a hero anymore, Sonic went on a long vacation alone. Sometime later, he got a call from Tails who said that the Chaos Emeralds had been stolen and Knuckles had been kidnapped by a group dubbed the "Marauders" so Sonic agreed to help find Knuckles. On his way to Tails, Sonic joined up with Amy and they beat one from the Marauders.

With help from G.U.N., Sonic and his friends located the Marauders' hideout where they found Knuckles. When the team tried to get to Angel Island to protect the Master Emerald from the Marauders, however, they discovered that Angel Island had been hijacked. Suspecting Eggman was working with Marauders, the group looked for the doctor. Eventually, the team located Eggman. However, the doctor claimed that he had been reformed and was against the Marauders as well, and was willing to help Sonic and the others fight the Marauders by leading them into Metropolis where the Marauders had drawn Angel Island to with the Chaos Emeralds. While Sonic was distrusting of Eggman's motives, he let the doctor join.

On the way there, the team came across Shadow who Sonic fought and convinced to join them. Later, Sonic and the others met a Marauder, called Shade, who revealed the Marauders were a group of echidnas called the Nocturnus Clan, exiled to the Twilight Cage in ancient times. Despite defeating her, Shade blocked their way to Metropolis, but Sonic and the others found a way around it. In Metropolis, Sonic, Knuckles and a part of the group went to Angel Island to secure the Master Emerald, while Tails and Eggman prepared a weapon against the Nocturnus Clan.

By hijacking an airship and with some help from Tails' team, Sonic and his group got to Angel Island where they met the Nocturnus Clan’s leader, Imperator Ix, who sought to rule the world. Ix unleashed his soldiers and overwhelmed them, but Sonic stood his ground until Tails and Eggman appeared and deployed their weapon, which dispatched the soldiers. Sonic and his team then fought Ix, but were unable to stop him from stealing the Master Emerald. Ix then used the Master Emerald to create a wormhole into Sonic’s dimension so that the Nocturnus Clan could conquer it and Angel Island fell from the sky. The team then came up with the plan of going after Ix into the Twilight Cage and reclaim the Emeralds and Shade joined Sonic’s team to stop Ix’s plan, having realized the evil nature of her leader.

Using the newly-built Blue Cyclone, Sonic and the group entered the Twilight Cage while Eggman stayed behind. Inside the Twilight Cage, Sonic and his team got five of the Chaos Emeralds back and gained the alliance of the alien races residing in there. When they prepared to invade Nocturne to find the last Emeralds, Sonic united the alien races under them, who then helped them infiltrate Nocturne. Once there, they split into two teams, with Sonic and Tails leading their group and Knuckles and Shade leading the other, to find the last two Emeralds in the possession of Charyb and Scylla.

On their way, Sonic and Tails helped Knuckles' group defeat Gizoid Centurions. Sonic and his group then found Charyb and beat him with the help of Knuckles and his team and reclaimed the Chaos Emerald. Once Knuckles got their Chaos Emerald as well, Sonic and his group headed to Ix’s throne room where they saw Knuckles standing by his duty despite Ix's persuasions and attacked him. After the fight, Sonic and his team stepped in and stalled Ix, while Knuckles got the Master Emerald back.

After the fight, Ix used Nocturne's power to achieve his Super State, but Sonic retaliated by using the seven Chaos Emeralds to transform into Super Sonic and defeated Ix for good. As a final act, however, Ix started to close the wormhole out of the Twilight Cage, but Sonic and the others got through it just in time. When they returned home, however, they realized that a lot of time had passed, which allowed Eggman to rebuild his forces, which they faced upon exit from the Twilight Cage.

In combat, Sonic has low damage power and low armor, but he gets three attacks per round thanks to his amazing quickness. With his speed, Sonic almost always goes first and can damage enemies before they get a chance to react.

In Sonic the Hedgehog Level Creator, Sonic makes an appearance as the single playable character in all user-created Zones.

In Sonic x Vapor, Sonic makes an appearance as the only playable character.

In Sonic Dash, Sonic appears as one of the playable characters. In this game, he is the only character who is available from the beginning of the game.

On April 24, 2020, in celebration of Sonic Dashreceiving over 400,000,000 downloads, Sonic was re-released as "Slugger Sonic", a variant character of Sonic dressed in a baseball uniform.

On May 14, 2021, Sonic was re-released as "Pirate Sonic", a variant character of Sonic dressed in a pirate-inspired costume, as a celebration of the 30th anniversary of the Sonic the Hedgehog series.

On January 20, 2023, Sonic was re-released as "Boscage Maze Sonic", a variant character of Sonic dressed in his Boscage Maze attire seen in Sonic Prime.

On August 1, 2023, as promotion for the newly released LEGO® Sonic sets, Sonic was re-released as "LEGO® Sonic", a variant character of Sonic in the Lego style.

On December 15, 2023, Sonic was re-released as "Snowdrift Sonic", a variant character of Sonic dressed in a Christmas-themed outfit.

On January 31, 2024, Sonic was re-released as "Dragonfire Sonic", a variant character of Sonic dressed in a Lunar New Year-inspired outfit.

On April 1, 2024, Sonic was re-released as "Jester Sonic", a variant character of Sonic dressed as a jester.

On August 26, 2024, Sonic was re-released as "Extreme Gear Sonic", a variant character of Sonic based on his appearance in the Sonic Ridersseries.

Classic Sonic also appears as a playable character. In this game, he can be unlocked after obtaining 100 of his Character Cards.

On December 13, 2019, Classic Sonic was re-released as "Elf Classic Sonic", a variant character of Sonic dressed to resemble a Christmas elf.

In Sonic Runners, Sonic and his team discovered that Dr. Eggman was back to sow up chaos again. With the aid of Tails and Knuckles, Sonic spent the next period foiling Eggman and his lackeys' numerous plots, such as kidnapping Animals, hunting Wisps on earth, harassing Chao, building new and improved Badnik armies, and attempting to procure the Master Emerald. Along the way, Sonic also helped several local inhabitants with their issues.

While Team Sonic managed to stop Eggman every time, it all would lead to Eggman's endgame: the construction of a new Brainwashing Laserpowered by the Chaos Emeralds to enslave the world with. Although Team Sonic secured the Emeralds, they were too late to stop Eggman from draining them of their energy. Sonic ultimately faced Eggman in a final showdown, but upon Eggman's defeat, the mad doctor fired his Brainwashing Laser at Sonic. Fortunately, Sonic was saved by the seven Chaos Emeralds he held, which reabsorbed their energies from the laser and transformed Sonic into Super Sonic, allowing Sonic to destroy Eggman's laser. Reuniting with his team, Sonic, after returning to normal, noticed that Eggman had snuck away to plan his next scheme, but was certain that they could stop whatever Eggman would come up with, before celebrating with his friends.

In Sonic Forces: Speed Battle, Sonic is a playable character.

On June 19, 2019, Sonic was re-released as Slugger Sonic, a variant character of Sonic dressed in a baseball-inspired costume as a part of the version 2.11.0 update.

On February 23, 2023, Sonic was re-released as "Boscage Maze Sonic", a variant character of Sonic dressed in his Boscage Maze attire from Sonic Prime as a part of the version 4.15.0 update.

On August 1, 2023, Sonic was re-released as "LEGO® Sonic", a variant character of Sonic in Lego style, as part of the 4.19.0 update.

On December 19, 2023, Sonic was re-released as "Snowdrift Sonic", a variant character of Sonic dressed up as the 'King' of Christmas, as part of the 4.23.0 update.

On January 30, 2024, Sonic was re-released as "Dragonfire Sonic", a variant character of Sonic dressed in a Lunar New Year-inspired outfit, as part of the 4.24.0 update.

On July 24, 2024, Sonic was re-released as "Extreme Gear Sonic", a variant character of Sonic dressed in his Sonic Riders outfit, as part of the 4.29.0 update.

Classic Sonic also appears a playable character, being added to the game's roster in the version 1.0.1 update.

On December 25, 2018, Classic Sonic was re-released as "Elf Classic Sonic", a variant character of Classic Sonic dressed in an elf costume, as a part of the version 2.6.0 update.

In Sonic Racing, Sonic is a playable character. He is available from the beginning of the game.

In 2021, to celebrate the 30th anniversary of the Sonic the Hedgehog series, Classic Sonic was added as a playable character. He becomes available by reaching League 7.

In Sonic Speed Simulator, Sonic appears as one of the playable characters for the player to choose from in the Characters menu.

In this game, Sonic and all of his variants are controlled in the same way as the other characters in the game. They also have the Spin Dash, Spin Jump, Spin Dash Charge, Homing Attack and Boost in their moveset. Their base speed and jumping height depend on the player's current level.

In The Murder of Sonic the Hedgehog, Sonic, Tails, Knuckles, Vector, Espio, Blaze, Rouge, and Shadowwere all ready to board the Mirage Express to celebrate Amy Rose's birthday. Before that though, all of them were given an outfit guide and lore cards so they could play a murder mystery game; the blue hedgehog in particular was given a sea captain suit (as one can see an anchor quite clearly on his hat).

Upon arriving at the train, Sonic met a local worker, who had just applied for the job of microwaving chili dogs. Soon after however, he realized that he did not bring the birthday cake he was supposed to give Amy later on, and the worker wished him luck. Later, the pink hedgehog explained him and the others the basics of the mystery game and the roles of the "murderer" and every one else. Sonic, being the captain of the Mirage Express, was sent to the conductor car.

When he arrived at his corresponding car, Sonic was greeted by the train's Conductor, who was about to retire after working for thirty two years. However, the blue hedgehog felt like something was wrong; when he asked to see the Mirage Express' power source, the Conductor had not even seen it. After the two took a look, they made a frightening discovery: the train was powered by a Flicky, therefore making it a Badnik in the sense of the word. Sonic wanted to destroy the vehicle, but the Conductor refused.

Shortly after seeing the Flicky, Sonic was attacked by the "murderer", Espio, who had shot him with a non-lethal blowdart as the "staff" themselves had instructed him to. The hedgehog wanted to tell him about the horrifying secret, but the chameleon disappeared. Right after, the lights in the car began glowing red and the Mirage Express' robotic arms caught the Conductor. With his last strengths, the fainting Sonic tore one of the arms off with a Spin Dash, but he was grabbed by another one of them and taken all the way to the Dining Car through a vent leading there. Much later, he was found unconscious there by Amy, Tails, and the worker. The pink hedgehog believed that he was playing along, while the worker made the assumption that he was genuinely hurt but brushed it off.

Much later, after Amy, Tails, Shadow, and the worker looked around the conductor car for clues, they finished their investigation and called everyone on the train to go there. Meanwhile, the pink hedgehog and Vector went to search for Sonic, before they found his body, entirely unconscious and hurt, at the Dining Car. As some of the heroes began performing an emergency prodecure to save his life, Tails and the worker concluded that the murderer was Espio, and gave their evidence as to why they thought it was him. Eventually, Sonic miraculously regained consciousness, and revealed to all the real truth of what had happened. Furious, Amy began smashing the train's walls with her Piko Piko Hammer, with Vector joining her. However, the Mirage Express began accelerating, knocking everyone there, the blue hedgehog included, out.

Eventually, Sonic woke up with the worker at the Dining Car, where they were contacted by Dr. Eggman himself through a videocall. The doctor then revealed to the two his plan of converting various cargo trains, including the Mirage Express itself, into Animal-powered passenger trains with far greater autonomy than the average Badnik to build Eggmanland and another Death Egg. By having his Badniks compete against each other to see who captured Sonic and his friends first, the scientist would manage to have them lead his nemeses to his base to take them out once and for all. When the call ended, the blue hedgehog ran through the Mirage Express and liberated his friends, with the worker following him.

When Sonic and the worker arrived at the conductor car, they freed Amy and Tails. Soon after, however, the group saw another videocall from Eggman, where he asked the train to accelerate so the heroes were taken to the scientist's base faster. As such, all of the heroes worked together to stop the Mirage Express. After Espio rescued the Flicky powering the train, Amy smashed the front of it with a powerful blow from her Piko Piko Hammer. The ensuing explosion sent her flying, but Sonic fortunately saved her. With all the heroes safe and sound, they began to properlycelebrate Amy's birthday, with the blue hedgehog bringing her a cake for the occasion.

In Sonic Rumble, Sonic appears as one of the playable characters for the player to choose from in the Characters menu

Shortly after the Phantom Ruby incidents, While in Spring Valley Zone, Sonic, Tails and Amy found a Chaos Emerald, only for Metal Sonicto steal it from them. Sonic tried to catch up to Metal Sonic, but was repelled by him. As he fell though, Knuckles caught him, who explained that he had been attacked by Metal Knuckles, who had taken one of the Chaos Emeralds from him. Suspecting that Dr. Eggman was seeking the Chaos Emeralds, Sonic, Tails and Knuckles decided to go to Summer Falls Zone, leaving Amy behind and forgotten.

There, they were attacked by Fang, Bean and Barkbefore they could get the Chaos Emerald they just found. During this scuffle, Sonic was busy fighting Bean. Though Sonic eventually managed to catch the Chaos Emerald, Fang shot it out of his hand with his Popgun, causing it to be lost below a waterfall. Unable to recover the Chaos Emerald, Sonic, Tails and Knuckles decided to move on.

In Autumn Forest Zone, Sonic, Tails, and Knuckles found Eggman and Metal Sonic. The trio proceeded to attack Eggman and surrounded him, but Metal Sonic escaped them. Later, they were joined by Fang's gang and Amy, who had brought Mighty and Ray with her. Eggman proceeded to explain that Heavy King had overthrown him and begun collecting the Chaos Emeralds to gain ultimate power and conquer the world.

Hearing this, Sonic decided to join forces with Fang and Eggman. The group subsequently went to Winter Caverns Zone, where they got to the entrance of Eggman's base. There, Sonic and Knuckles were attacked by Metal Sonic and Metal Knuckles. Sonic and Knuckles proceeded to fight the robots until Eggman regained control of them.

Inside the base, the group found Heavy King, who began bombarding them with energy projectiles empowered by the seven Chaos Emeralds. Finding themselves on the losing end, Sonic decided to distract Heavy King so that his friends could take Chaos Emeralds from him. After Sonic caught Heavy King's attention, he made the robot focus his firepower on himself, which would run out of juice after he lost the Chaos Emeralds. With Heavy King, weakened, Sonic defeated the robot.

Afterward, Sonic and his allies departed the base and decided to share the Chaos Emeralds between them to keep Eggman from getting them. Sonic himself took the blue Chaos Emerald with him and said goodbye to Tails and Amy as he left to hide his Chaos Emerald.

Sonic eventually decided to get his driving license in order to take part in Mr. Munch-Um's rally race and win a lifetime supply of world-class chili dogs. For his driving test, he received Kip the Capybaraas his driving instructor. Sonic, however, did not know any road safety practices and kept talking to Kip instead of focusing on the road. When Kip gave him an "E" rank for his driving though, Sonic decided to get it together.

However, when Sonic heard on the radio that Mr. Munch-Um's rally race was about to take place, Sonic decided to hurry to the contest using Kip's car. After taking the car through a loop, Sonic heard on the radio that Mr. Munch-Um's Road Rally had been postponed due to an attack on the city by Dr. Eggman. Before Sonic could head out on foot to stop Eggman however, Kip asked him to take a shortcut in the car at high speed. Sonic liked the idea and told Kip that they were beginning a beautiful friendship.

Sonic and Tails were later attacked by the Hard Boiled Heavies and their fellow Badniks. However, the robots would be called back to base by Dr. Eggman himself. Along the way, Sonic also heard that it was Eggman's birthday, prompting him to give Eggman a birthday greeting.

One time, Sonic and Tails were out looking for Dr. Eggman's newest base. As they waited for a group Badniks to appear in order to see where they went however, Sonic got quite impatient. As such, when some Badniks did show up, Sonic blasted out from their hiding place and Spin Dashed all of them.

While patrolling around later on, Sonic noticed some commotion coming from Amy's house. Discovering a huge gathering there, Sonic tried getting to the bottom of it. Finding Tails and Amy in the center of it all, Sonic was told by Tails to check out Amy's self-made comics of their adventures. After taking a few looks, Sonic praised Amy for her awesome and accurate portrayals of himself. Eager to have someone to document their adventures now, Sonic began telling Amy about when he and Tails "fought" Eggman on his birthday, who eagerly took notes.

Sonic and Tails go on a vacation to Flicky Island, on the island waiting for their arrival would be the Witchcarters, who he would Spin Dash Bearangerand get captured by Witchcart in a crystal. Tails would go through the island and catch up to Witchcart in Panic Puppet Fortress, who he would be teased by her until Tails freed Sonic. After Sonic was released, he and Tails would trap her in a crystal. Sonic and Tails would continue their vacation afterwards.

Sonic would be captured by Metal Sonic and saved by Amy Rose. He would then assist her in freeing everyone else from the other Capsules. Afterwards, Sonic would join Amy, Tails, Mighty, and Ray in a picnic to celebrate their victory.

Sonic was resting in Emerald Hill on West Side Island until Fang's Gang attacked him. With their defeat Fang mentions how they are on a hunt for a rumored eight chaos emerald. Sonic says that there are only 7 but Fang begs to differ till they leave to go elsewhere. Tails then hurries over and tells sonic about a disappearing ship on South Island that attack in Marble zone then vanished, sonic curious him and tails go to the tornado to find the ship. Later that night sonic and Tails are on the Tornado ready to strike until the ship vanishes, this leaves sonic angry as to how there is no action, but tails reassure him saying he need to analyze its pattern back at his lab. The next day Sonic curious to continue the hunt is bored with tails saying he build a tracker but will have to install it to the plane first leaving sonic to wine about going nowhere. Later on, the duo reaches the plane with sonic and tails going inside to investigate with the duo overriding the reactor leaving the ship to crash into the water.

About a month later, Sonic noticed a local town called Vista View under attack from a Badnik force. He quickly rushed to their aid, helping trash many of the robots. He soon came across some Egg Hammers though, who were able to put the pressure on the hedgehog. While running underground in the sewers to avoid them, he met and said hello to Big. Fortunately, Sonic's best friend Tails was able to step in and help him destroy the Badniks. Afterward, Tails confided in Sonic that the Badniks had been undergoing much more coordinated attacks following Eggman's absence. Realizing there could be something controlling them, Sonic thought it might be Eggman, but Tails did not believe so, as Eggman was known for making sure they knew he had returned before attacking. Regardless, Sonic remained determined to take care of the rest of the Badniks like he always had, but Tails expressed his worry over the thought of Sonic losing again. Sonic thus promised Tails to be careful and even offered him to tag along with him. However, Tails decided it was more important to help the town that they had just saved rebuild and recover. Commending Tails for his decision, Sonic set off on his new quest alone.

At the neighboring town called Riverside, Sonic brought down the Death Crab down before it could cause any major damage. Amy Rose then arrived and helped finish the Death Crab off. She explained that she heard about Sonic and Tails' latest actions and came by to find Sonic to present him with a request: rejoin the Resistance. The Resistance had their hands full as there were many leftover Badniks from the last major battle against Eggman who randomly attacked citizens. However, much to Amy's dismay, Sonic declined her offer as he wanted to find out who was controlling the Badniks on his own.

Sonic and Amy soon discovered that the Death Crab was just a decoy so that more Badniks could invade from the west. While Sonic thinned them out, Amy rallied Wispon-wielding villagers to help destroy the Badniks that reached the town square. Sonic and Amy then continued to destroy more Badniks and find their source. During this time, Amy kept asking Sonic to join the Resistance. Soon, Sonic and Amy discovered a Blowfish Transporter unloading many more Badniks at the edge of the town. With their Croquette Bombertechnique, the duo took out the Blowfish Transporter. Afterwards, Amy came to terms with Sonic's decision and let him be on his own. Regardless, she requested for him to check on Knuckles the Echidna in a nearby town as she had not heard from him since. Accepting the mission, Sonic set off to find Knuckles.

As he arrived at Barricade Town, which was a hub for Wispon distribution, Sonic found that Knuckles had already dealt with the Badniks that had been attacking the town. Knuckles explained that the town's Wispon shipments had dwindled and he had come to find out why. The two entered the town and found its citizens in a panic. They were told that all the town's Wispons had been stolen by a duo of mercenaries that had, before the Eggman War ended, driven Eggman's forces away and saved the town, only to then conquer the town and keep its arsenal to themselves. With this in mind, Sonic and Knuckles continued to the town's supply depot-turned-fortress to defeat the mercenaries. There, they encountered a group of captives Wisps being hoarded. Soon, Sonic and Knuckles confronted the mercenaries, who introduced themselves as Rough the Skunk and Tumble the Skunk. A battle ensued between the four, which seemed to be evenly matched until Sonic called upon the help of the Wisps that were trapped within the Wispons Rough and Tumble had stolen. They broke out of the Wispons and allowed Sonic and Knuckles to easily defeat Rough and Tumble, who were promptly arrested and hauled off to jail. With the town now free, Sonic and Knuckles began partying with the townspeople.

Continuing his journey, Sonic arrived at Spiral Hill Village, where a Buzz Bomber battleship was deploying by a stream of Badniks to attack the village. As he entered the village, he reconsidered Amy's invitation to rejoin the Resistance, but pushed that aside. He soon after noticed a ring-tailed lemur fighting the Badniks as well, who introduced herself to him as Tangle the Lemur. Together, they fought the Badniks until they got cornered by a large group of them. Fortunately, Blaze the Cat appeared and helped them tear through the rest of the Badniks' ranks, including the giant Buzz Bomber. Once the attack had ended, Sonic introduced Blaze and Tangle to each other, and asked Blaze what brought her to his world. She explained she had come to prevent a "terrible event" on his world, as per the Sol Emeralds' directions. Sonic thought she referred to Eggman's global takeover until Tangle brought up the possibility that the organized Badniks could a sign of something worse coming their way, which made Blaze stay until she understood why she was here. After bidding farewell to Blaze and Tangle, who went to calm the fires in the village, Sonic continued his search for the Badniks' ringleader.

Sonic was later contacted by Team Chaotix, who needed his help. Meeting up with his escort Espio, the two heroes were forced to clear out some Badniks that were attacking them. After that, Sonic was filled in on the Chaotix Detective Agency's activities by Espio, who told him that they had finally found Dr. Eggman, and that he was taking him to him. Arriving in Windmill Village, Sonic was introduced to a friendly Dr. Eggman, now going by the name "Mr. Tinker," but scoffed the doctor's greeting. Learning from the Chaotix that Eggman was suffering from amnesia, and had become a productive member of the village, Sonic began talking with the Chaotix and the village's elder about what to do with the doctor since it did not seem right to penalize him now that he was a good man with no recollection of his evil deeds. However, a horde of Badniks soon approached the village. Suspecting Eggman to be behind them, Sonic confronted him while the Chaotix faced the Badniks, only to find a scared Mr. Tinker protecting the local children. Convinced now that this form of Eggman was a new man, Sonic helped the Chaotix beat the Badniks. Telling the Chaotix about Mr. Tinker, the group decided to leave him to his new life. After properly greeting Mr. Tinker, Sonic prepared to leave, but then noticed Mr. Tinker mention Eggman Land. Immediately after, Shadowand Rouge showed up, with the former seeking to destroy Eggman.

Although Sonic tried telling Shadow that Eggman's amnesia was legit and that he was now a good man that did not deserve the punishment Shadow had planned, Shadow did not care. Eventually, their disagreement came to blows. While they raced around and fought however, Sonic convinced Shadow that Eggman was not beyond forgiveness, just like Shadow was in spite of his past attempt to destroy the world. However, when Shadow realized that Sonic had been leading him away from Eggman, the back hedgehog went back to Windmill Village, forcing Sonic to hurry back. Fortunately, by the time Sonic arrived, Mr. Tinker had convinced Shadow that he was not the person he used to be by showing him that the "Eggman Land" he mentioned earlier was but an amusement park for children which he had named after a word that "came to him." After Shadow and Rouge took their leave, Sonic promised Mr. Tinker that he would come back to visit, even if it was only to check if the doctor's memories were returning.

Eventually, Sonic joined up with Tails again, whom he began raiding bases within search of clues to who was commandeering the Badniks. While flying through the sky in the Tornado however, the duo encountered an Egg Fleet battlecruiser. Seeing this as a chance to get a noteworthy clue, Tails had Sonic board the battlecruiser with his Miles Electric so he could get some computer data from a computer. On the cruiser, Sonic met someone who looked like Eggman. Since Sonic had seen Eggman however, he didn't buy the bluff, and the faker revealed himself to be Neo Metal Sonic. Neo Metal Sonic revealed that he was supposed to be the doctor's greatest weapon in the final battle during the Eggman War, but he was completed too late. Since he had been given his creator's genius, vision, and drive however, Neo decided to take over the Eggman Empire and conquer the world for Eggman as him (making him the ringleader behind the Badnik attacks) and then find the real Eggman so he could hand his empire back to him. Sonic realized that this was the reason that he had to fight a phantom of Metal Sonic during the Eggman War instead of the real thing. Sonic tried to defeat Neo Metal Sonic and his army of Egg Pawns but was forced to flee after Neo Metal Sonic copied his bio-data. Destroying the ship's Badnik staff and artillery along the way, Sonic ultimately escaped Neo Metal Sonic with Tails and the Tornado's aid. Rendezvousing at Resistance HQ, Sonic told Tails, Amy and Knuckles of what he had learned. In an effort to undermine Neo Metal Sonic's scheme, Sonic and co. decided to search for any old plans that could tell them what Neo Metal Sonic was up to.

Soon after, Sonic infiltrated one of Eggman's bases. There, he encountered Silver when the psychic hedgehog destroyed a Spina for him. The two of them then noticed that the "Guardian Angel" was in the area when she sniped a Spina sneaking up on them. With Sonic oblivious to who that was, Silver told him about her and her efforts during the Eggman War. Silver then explained that he had come back from his time to help Sonic and co. stop an event which would lead to the extinction of all life in his time. The duo soon after found the Guardian Angel. Although Silver scared her into the shadows, Sonic convinced her to trust them when her Wisps playfully greeted him. With the Guardian Angel, who introduced herself as Whisper, on their side, Sonic and co. broke into the base's computer room. There, they overcame E-107 Theta and a horde of Spinas. After keeping Whisper from destroying the computer, Sonic had Silver access the Eggnet. On it, they discovered Neo Metal Sonic's horrific plans, which prompted Sonic and Silver to contact Knuckles and Amy at Resistance HQ and have them call everyone in.

Returning to Resistance HQ, Sonic and the Resistance's allies were informed of what he and Silver had discovered: that Neo Metal Sonic had conquered Angel Island, which he had turned into a flying fortress, and secured the Master Emeraldfor himself on the island. As Amy laid out a plan on how they could liberate Angel Island, Blaze offered to confront Neo Metal Sonic as Burning Blaze, which Sonic was all about. However, Tails shot down that plan, having deemed it too risky if Blaze had to face Neo Metal Sonic's powers. In the end, Sonic and Knuckles were chosen to confront Neo Metal Sonic instead and secure the Master Emerald while the others focused on breaking the Egg Fleet's control over the island.

On their way to Angel Island in one of the Resistance's battleships, Sonic thanked Whisper for joining them on this mission before paying Tails a visit in the captain's nest. As the two friends were having a moment however, the Egg Fleet began bombarding the ship. Using their Extreme Gears, Sonic and Knuckles left the crashing ship and flew to the Master Emerald's shrine, which had been turned into a fortification. Inside it, the two heroes found Neo Metal Sonic on top of the Master Emerald. When they tried to confront him however, Neo Metal Sonic used the Master Emerald to turn into Super Neo Metal Sonic.While Sonic was undeterred, Super Neo Metal Sonic went on the offensive. Sonic subsequently tried to distract Super Neo Metal Sonic while Knuckles went for the Master Emerald, but both him and Knuckles were foiled and outfought at every turn by the robot. When Sonic and Knuckles ended up lying in defeat before Super Neo Metal Sonic however, Shadow showed up and succeeded in making Super Neo Metal Sonic revert back to normal before laying the smackdown on him. Sonic brought the fight to a halt though, concerned that Neo Metal Sonic would copy Shadow's powers. However, Neo Metal Sonic revealed that he had just finished copying Shadow's bio-data, which, combined with Sonic's bio-data and the Master Emerald's power, would let him assume his final form. While Knuckles and Shadow tried in vain to stop Neo Metal Sonic, Sonic convinced them to evacuate the stronghold once the structure started to fold into Neo Metal Sonic. The ground soon after began to rumble and Knuckles noted that the Master Emerald had been cut off from Angel Island ― without its power, the island would fall. Meanwhile, Neo Metal Sonic grew into a form more monstrous than the last ― dubbing himself Master Overlord ― and demanded that Sonic bowed to him.

Getting attacked by Master Overlord, Sonic heard from Knuckles that Burning Blaze could not help them. He, Knuckles and Shadow were then grabbed and flown away by Master Overlord, who wanted them to see him destroy their allies, who were onboard an Egg Fleet battleship. It was then that Sonic came up with a plan: if they could drive Master Overlord closer to Angel Island and rip the Master Emerald out of him, they could deprive the robot of his power source and save the island. When the trio escaped Master Overlord's grasp, Sonic and Shadow focused on attacking Master Overlord's wings while Knuckles went for the Master Emerald. Sonic also taunted Master Overlord, which distracted the robot long enough for Sonic's allies, whom Knuckles had relayed Sonic's plan to, to swarm Master Overlord and help drive him towards Angel Island. During the battle, Sonic got shaken off Master Overlord, but was rescued by Silver with his psychokinesis. Knuckles subsequently got the Master Emerald away from Master Overlord after Tails rammed the robot with his battleship, and brought it back to Angel Island, returning the island to the sky while Master Overlord powered down to normal. Down on Angel Island, Sonic sought out Tails, who was safe and sound. With Angel Island now back to normal and Metal Sonic offline, Sonic and Tails celebrated their victory.

Sonic later had Tails partially repair Metal Sonic so he could talk with the robot. Upon waking up, Metal Sonic threw himself at Sonic, only to collapse in his arms, unable to fight. Sonic explained everything and proposed a truce and the chance for a new life since Eggman was out of the picture. The robot, however, rejected Sonic's offer and flew away. Although disappointed, Sonic decided not to follow him out of respect for his choice. Later, Sonic made several rounds around the Angel Island and informed Knuckles that the island seemed intact. He offered Knuckles to join the others on the trip back to Resistance HQ in the Egg Fleet battleship Tails was repairing, but Knuckles refused, having decided to remain and guard the Master Emerald. When Sonic then asked him about the future of Resistance, Knuckles decided to dissolve the organization. Sonic then went to the battleship, where he met Amy. He informed her about the Resistance's disbandment, and then ran to Tangle and Whisper when the Chaotix demanded payment. Tangle expressed her excitement about her new life to Sonic, but Whisper decided to remain silent. Sonic decided to give the latter some space. He then met Silver and Blaze, who were both holding off their trips home for the time being. This made Sonic note that this was a chance to have more adventures together. Sonic later met Rouge, whom he asked for her next plans and asked to thank Shadow for him. Sonic then visited Tails on the captain's bridge and congratulated him on the record-breaking repair of the ship and another well-finished adventure as the battleship took off Angel Island.

Sonic would later pilot the Tornado for Tails to test the biplane's new engine. During the flight however, the heroes stumbled upon a Stealth Balkiry who had stolen supplies from a Resistancewarehouse. Sonic and Tails subsequently chased the Badnik to a volcanic island. There, they directed the robot so that it was hit by lava fired from a geyser. As it then dropped the stolen supplies, Sonic destroyed it in midair, and was caught by Tails on the Tornado's wing. Sonic proceeded to thank his friend and let him take the helm, stating that landing the plane is too slow for him.

Later, Sonic dropped by the Sonic Fan Club's first meeting and destroyed the Egg Pawn bothering them before taking off again.

While Sonic was relaxing with a Flicky, Tails came with a letter he had received which foreshadowed Eggman's return to his evil ways in Windmill Village. Deciding to check this out, Sonic and Tails went to Windmill Village. There, they found no one, except for Elder Scruffy, who had been beaten up and hung up in a tree. While helping him, Elder Scruffy revealed that Eggman had been kidnapped a week ago by two thugs, who had since returned and locked up the villagers in the community center. Immediately after, the thugs appeared, who turned out to be Rough and Tumble, now wielding new weapons. Sonic subsequently faced the skunks to distract them while Tails and Elder Scruffy freed the villagers. Knowing that Rough and Tumble were not smart enough to make their weapons or leave cryptic letters, Sonic guessed they were working with someone and demanded that they told him where Eggman was. However, the brothers were not interested in that. Eventually though, Tails joined the fight. Splitting Rough and Tumble up, Sonic took on Tumble, who became a blubbering mess after Sonic smashed his new prosthetic tail. Bringing Tumble together with Rough, who had been defeated by Tails, Sonic almost got Rough to tattle, only for the brothers to vanish through a portal. Although Sonic was reluctant to admit that the old Eggman was back and helping Rough and Tumble, Sonic figured that someone must have freed Rough and Tumble and told them where to find Eggman. With Tails staying behind to fix Windmill Village, Sonic left to find Silver to see if he had found something.

Following a lead from an informant Silver had met, Sonic and Silver went to Frozen Peak where they found an Eggman base teeming with activity. Before they could attack though, Metal Sonic ambushed them. During the subsequent fight, Metal Sonic got saved by Dr. Starline, whom Silver recognized as his informant. Introducing himself, Starline revealed he was behind their concerns and that he had staged this encounter to test himself against Sonic. Realizing that it was Starline who worked with Rough and Tumble, Sonic asked him about Eggman, and Starline revealed he had restored Eggman's memories. Sonic and Silver thus engaged Starline and Metal Sonic. Although Silver took care of Metal Sonic, Sonic got sent through a portal and over a cliff, prompting Silver to follow Sonic through the portal. After Silver saved Sonic, he and Sonic hurried back to Starline, whom Sonic pinned down and demanded info on Eggman from. In response, Starline gave them a code to a vault in the base, which Silver went to check out. When Starline then revealed that Eggman was up to something and that he had given Silver the activation code for a bomb, Sonic hurried into the base to stop Silver. Although Sonic was too late, Silver managed to protect them from the bomb's blast with his psychokinesis. Sonic then took the injured Silver to Restoration HQ to recuperate. After bringing Amy up to speed, she and Sonic tried figuring out their next move, as they knew nothing about what Eggman was up to. In an effort to locate Eggman and figure out his plan, Amy figured they could tap into his networkfrom an unguarded Eggman base in Echo Mine. With a new mission target, Sonic got Amy to come along since its was her plan.

Eventually, Sonic and Amy reached the base in Echo Mine where they found an old Eggman computer. Amy soon managed to hack it and find plans for an ARK-like space station and talk about a "payload distribution". However, before the heroes could learn more, Rough and Tumble appeared in a large tank with a massive drill and guns. Sonic, however, again mocked the skunks' attempt at a rhymey introduction. He then took Amy and escaped with her through the mines until they reached a refuse pit, and they decided to use the narrow floor in the cave to defeat Rough and Tumble. When Rough and Tumble arrived, Sonic brought Amy in from to the rear of the tank. He then threw Amy up to the tank's cockpit, which she destroyed while Sonic hit the tank's treads. The tank subsequently fell into the refuse pit, but Rough and Tumble escaped and activated their backup backpacks. This made a metallic liquidgush over them and turn them into Zombots. Sonic proceeded to engage Tumble, only for the Zombot to instantly regenerate from any damage he got. As Sonic then wiped his mouth, he discovered he had been infected with the same liquid that turned Rough and Tumble into Zombots. After warning Amy not to touch them and fighting with Tumble some more, Sonic disposed of both Zombots by knocking them into the refuse pit. He then showed Amy the infection and asked if she had any good ideas.

Taking Amy's advice, Sonic hurried to Tails' Workshop to get Tails to look at him. While Sonic had Tails run some tests on him, Tangle came by for a visit. After discovering the extend of how contagious Sonic was, Tails conclude that Sonic had forced this Metal Virus into remission with his speed. Seeing that Tangle had questions, Sonic brought her up to speed. After Tails then realized that they had to warn people about the Zombots, Sonic and Tails heard what Tangle had been up to. Afterward, the group tried to figure out their next course of action. Since Amy had found plans for a battleship that Eggman was planning to spread his virus with, they concluded that they should find it. When Sonic tried to high-five Tangle however, he saw his infection had returned and withdrew himself. Seeing that Sonic's speed could only burn off the virus and keep in check, Tails wanted to conduct more tests. Not wanting to risk his friends' well-being, Sonic left to find Eggman's battleship. On the way, Sonic reflected on how different things were this time with this new threat Eggman was posing. Nevertheless, he assured himself that they would get through this.

Sonic later came to Seaside City after he learned that Eggman had attacked it with the Metal Virus. Upon arriving, Sonic saved Vector from some Zombots and learned that Team Chaotix were evacuating the inhabitants to the docks. Following Vector's plan, Sonic decided to distract the Zombots in order to facilitate the rescue operation. Along the way, Sonic blew past some Zombots blocking the way down from a roof in order to rescue two residents. Soon after, he saw a Rescue Shuttle arrive to take the survivors to safety. Knowing this would draw the attention of the Zombots, Sonic wanted to save everybody. However, noticing how much his infection had spread, Sonic decided to take a quick run-in order to burn it off. When Sonic later arrived at the port, he learned that Charmy Bee had flown back into the city. After ordering Vector and Espio to escape with the evacuees, he went to look for Charmy.

Having failed to find Charmy, Sonic went to Floral Forest Village to evacuate Cream, her family, and the other villagers before Eggman's Metal Virus hit them. By the time Sonic arrived however, Eggman had already created a Zombot outbreak. While fighting the Zombots, Sonic began thinking about how he failed to save Charmy and how he did not want history to repeat itself. Soon after, Sonic noticed that the Zombots were beginning to ignore Eggman's orders. Later, as Sonic helped villagers evacuate to the north glade where the Rescue Shuttle would be, Sonic noticed his infection was getting worse. As he thought about whether he should leave the villagers and go for a run to burn off the infection or stay and help the village, he was attacked by Gemerl, who had deemed him a threat to Cream and her family due to his infection. Sonic explained that he could keep his infection in check, but Gemerl refused to consider Sonic less of a threat. Sonic suggested to Gemerl that he could remove the Metal Virus by interfacing with it, but Gemerl noted that he and the Metal Virus were incompatible. Nonetheless, Gemerl gave Sonic an ultimatum: either run away and burn off his infection or stay and be eliminated. In the end, Sonic chose the former, since he could not fight Gemerl and the Zombots at the same time and because his infection was reaching its apogee anyway. During his run, Sonic kept two villagers from starting a forest fire to keep the Metal Virus from spreading. Hurrying to Cream's house afterward, Sonic blew away a Zombot trying to get Vanilla and Cream. Seeing that Cheese and Chocola had become Zombots too, Sonic encouraged a grief-stricken Cream to be brave and promised her that they could find a way to cure the Zombots. After seeing Cream fly her mother towards the north glade, Sonic was saved from some Zombots by Gemerl, who apologized for his behavior. Forgiving him, Sonic told where Cream and Vanilla went and instructed him to ensure the Rescue Shuttle took off safely. Sonic then trapped Cheese and Chocola in glass jars to keep them from flying away. As he engaged more Zombots, Sonic was contacted by Rouge, who needed aid evacuating Sunset City, which was Eggman's next target. Agreeing to help her and Team Dark with the interception, Sonic swore not to let any more of his friends fall victim to the virus.

When Sonic came to Sunset City, a massive Zombot outbreak had already begun. While fighting through the Zombots, Sonic looked for civilians to save while noticing that his infection was getting worse. After a while, he heard cries for help. Seeing some civilians being kept in a building by Zombots, Sonic rushed in to clear the Zombots out, only to pull back when Omega beat him to it by shooting at the Zombots. Sonic tried to persuade Omega to hold back against the Zombots as they did not choose to be Eggman robots, but Omega remained determined to destroy any Eggman-related robot. Nevertheless, Sonic noticed that the Zombots were too hardy for Omega to really damage. Sonic then saw Rouge, who told him to escort the survivors to the Grand Gold Flicky Hotel where they were organizing survivors. With Omega's help, Sonic managed to evacuate the civilians from the building. After then clearing out a path to the hotel for the survivors, Sonic met Rouge there and told her about his infection and that Eggman could no longer control the Zombots. Immediately after, Sonic heard some civilians call for help, as the Zombots were coming. At first, he wanted to reach out to a civilian, but then he remembered that he was infected. Sonic proceeded to create a whirlwind that blew the nearby Zombots away. Sonic then went to help Omega, who was slowly getting surrounded by Zombots. However, the Zombots were knocked away by Shadow when he arrived in a truck to take the survivors away in. Upon seeing Shadow though, Shadow blamed Sonic for this crisis; if he had not stopped him from destroying Eggman in Windmill Village, none of this would be happening. Although Sonic tried to defend himself by noting that Starline was the one who brought Eggman back, he had to cut his argument with Shadow short, as he needed to go on a run to burn off his infection. He thus left the evacuation of the civilians to Team Dark, although not before informing Shadow that if the Zombots infected him, he could run around to control his infection. As his run took him outside the city, Sonic began to feel his fatigue catching up to him. Seeing the city chaos also made Sonic worried about his friends. However, he shoved those thoughts aside in order to focus on the task ahead. By the time Sonic returned to Team Dark's site however, Rouge told him to "handle" Shadow. As Sonic wondered about what she meant by that, he got pinned against the truck by Shadow, who had become a Zombot.

Sonic began to fight his Zombot rival while also realizing he would get the chance to say "I told you so" to him later. He found discomfort in having to fight not only Shadow but an entire city of Zombots. Nonetheless, Sonic kept the pressure up on the Zombots and confirmed with Rouge that all the uninfected citizens were secure. When Rouge took off with the truck, Omega stayed behind to continue fighting the Zombots though Sonic teased him to say that he stayed to help him exclusively. Sonic soon spotted Shadow running after the truck. As the Zombot Shadow did not know how to properly use his air shoes, Sonic was able to catch up to him only for Shadow to throw him back. Omega suggested to Sonic that he should retreat before his infection took over completely, but he refused as he did not believe the truck was far enough away and he did not want to leave another friend behind. Omega protested, saying that they were not friends. Sonic instead suggested that they both retreat since Omega could not actually destroy the Zombots but the latter refused. When Omega began to violently fight Shadow, Sonic tried to remind him who he was, but Omega did not care as he saw his former partner as another Eggman robot. Sonic continued to fight the Zombots until Shadow ripped Omega's chest open and his two arms were torn off by two other Zombots. Sonic used a Spin Attack on Shadow and tried to reason with him but to no avail. He tried to suggest a retreat one more time to Omega, but he still refused. Just when Sonic thought it was all over, the recently healed Silver arrived on the scene and used his psychokinesis on all of the Zombots to clear a path for him. Tails told him to go to the Tornado which was waiting just outside the city to the east. With this, Sonic fled the scene.

Later at Restoration HQ, Sonic was let inside by Cream. He was told that though it was past her bedtime, she was permitted by her mother to help around. Cream goes on to tell him that she has been trying to keep the refugees happy by handing out snacks and sweets to them, which left Sonic to call her the bravest hero there. Sonic was told that Amy was asking for him. Before he could enter her office, Gemerl stopped him due to his hazardous infection. Cream told Gemerl off, saying that Amy had requested to see him personally. With this, Gemerl moved out of the way and Sonic joked that he was a "mechahazard" due to the Metal Virus. Inside, Sonic found Rouge and confirmed to her that Shadow was lost to the Metal Virus. This angered Rouge and she stated that he should have run when she said so. Sonic began to talk to Amy who wished to see how he was doing. However, she quickly turned her attention back to the search and rescue missions she was coordinating. Sonic next found Vector and Espio who have been taking shifts in finding survivors and supplies while also looking for Charmy, the latter part of which Sonic did not think was a good idea. Espio then considers Sonic's health, and the hedgehog told the duo that he could only afford small naps before the virus caught up to him. After the trio said their goodbyes, Sonic met up with Silver and Tails and thanked them for their help. He confirms with Silver that the Metal Virus was the cause of his metallic future, though he did not see any Zombots (or anyone) there. Sonic checked up on Omega whose body was left behind in Sunset City. Tails explained that he would give the robot a temporary body in the future once he had the supplies and the time. Tails went on to explain that since the data he got from Sonic before was too robust to create a cure from, he created a sensor for him that would read his biometrics to give insight as to how his speed combated the Metal Virus. However, he also stated that the computers in the HQ would not be able to read that kind of data and planned to go to his lab in Central Cityinstead but was wary that he may get attacked by Zombots. Silver proposed to cover him, despite the risk that he may be called elsewhere but Sonic took Silver up on his optimism.

Sonic took off with Tails' bio-scanner and started to burn off more of the growing Metal Virus infection. He soon called Tails, who had gone to Central City, when he was running at the outskirts of Barricade Town. After explaining how well he got the data from his bio-scanner and the situation at Central City, Tails suggested that Sonic kept running so he can find a cure for the virus. Sonic understood and wished Tails luck. When Sonic reached Barricade Town, he found that it had attacked and wondered if he would be able to help any survivors there. Once he sees Dr. Eggman present in the village, he goes to interrogate him on why he decided to go back to his evil ways after Dr. Starline restored his memories instead of being more like "Mr. Tinker". Eggman told Sonic that he was "bringing peace and unity to the world through his brilliant guidance", which he considered to be better than his deeds as Mr. Tinker. Sonic disagreed with Eggman's vision and after having had his patience spent, he demanded that he reverse the effects of the Metal Virus. Eggman refused, saying that he could not stop it if he wanted to and after he managed to control the Zombots he would be able to take over the world. This proved to be the last straw for Sonic and prompted the hedgehog to engage in battle with Eggman. After being taunted by the doctor, Sonic jumped onto Eggman's Egg Mobile in an attempt to infect him. Eggman instead dodged this by flipping over in the Egg Mobile, which forced him and Sonic to fall to the ground. As the duo got surrounded by Zombots, Sonic jokingly taunted Eggman on how he could not do anything about it. However, after Starline managed to find a working frequency with the Egg Mobile that could control Zombots, the infected instead attacked Sonic solely.

When Eggman demanded that Starline upload the frequency to the Faceship, Sonic burst out from the pile of Zombots and destroyed the Egg Mobile. After Starline rescued Eggman from Sonic and the Zombots, Eggman berated Sonic for destroying the only means of controlling the infected. Sonic sarcastically voiced his concern and told Eggman to work on a cure instead. Eggman refused again and then retreated with Starline back to the Faceship. Sonic looked to his arm to realize that the bio-scanner had been destroyed after he destroyed the Egg Mobile. Feeling hopeless, Sonic upsettedly reflected on how his little faith in Eggman has made several people pay for it in the end. Soon, as Sonic is almost fully infected, the hedgehog is nearly attacked by several Zombots that climbed up onto the rooftop. Sonic quickly ran out of Barricade Town and refused to give up as he still believed he had time to make things right. As the hedgehog took a brief break from full-speed running, he received a call from Amy. She told him that Restoration HQ and Tails' lab were overrun by Zombots, stating that they were now on the way to Spiral Hill Village to help evacuate it. Despite his fatigue, Sonic readily pledged his assistance, clinging to the hope that things cannot get any worse.

Soon enough, Sonic arrived at Spiral Hill Village ready to help. As he saw that the Restoration was helping out with evacuation, he believed that he should check in with Amy to see what he could do; out of the corner of his eye, he spotted Espio and decided to help him out first. After beating some Zombots back before they could attack the chameleon, Espio explained the current situation in the village; Amy and Gemerl were watching the Rescue Shuttle, while the latter scanned survivors for infections; Tails and Cream were helping evacuate any uninfected villagers they could find; he was last told that Silver went to Ice Paradise to help out there; and he, Tangle and Whisper were distracting the Zombots until it all survivors had been found. When Sonic asked where Vector was, the chameleon told him that they had found Charmy and had him contained. Espio felt that the situation was his fault as he believed he should not have let Vector bring Charmy back to Restoration HQ. However, Espio also angrily pointed out that he should not have let Sonic convince him to leave Eggman alone in Windmill Village. While Sonic argued that it was not Eggman and they did not know that Starline would turn him back into his evil self, Espio told him that they would not have had to worry should they have dealt with him earlier. Sonic went on to ask if they should then never give second chances to anyone, leaving him and Espio to have an intense stare at each other. Not wanting to prolong the events, Espio wished to continue the mission, which Sonic agreed with. The hedgehog tried to barricade a few Zombots within a building and was helped by Whisper after she used her Variable Wispon to cut down a streetlight to block the entrance.

Sonic soon arrived at the Restoration's choke point, where Amy jokingly noted his fashionably late arrival. She informed him that while Espio, Tangle and Whisper kept the Zombots in the village distracted, Tails and Cream helped rescue uninfected citizens. She also noted that if they attempted to retreat, the Zombots would swarm them, which led Sonic to want to find a way to cover the escape. When Sonic met Tails and Cream and the latter gave him the cold shoulder, Amy quietly told the hedgehog how Vanilla had stayed behind in Restoration HQ to hold back some Zombots. After Sonic told Tails that he lost the bio-scanner after a fight with Eggman and Tails stated that they could not find any more survivors, Amy called for a retreat. Sonic ran off to find Tangle and coordinate with her. He came across her fighting in the Mineral Museum and told her of Amy's call for a retreat. Unable to quickly flee without drawing attention from the Zombots, Tangle suggested Sonic carry her around while she wrapped her tail around nearby lampposts to create a trip wire to block the Zombots. When Sonic initially refused for fear of infecting her, she revealed her own infection. Sonic was horrified and apologized to her, but she urged him not to give up, stating there were still survivors to protect and that he could still set things right. With that, they enacted their plan, blocking off several Zombots. Having resolved to stay behind, Tangle asked Sonic to apologize to the others for her, knowing Whisper would be devastated when she heard the news. Sonic said he would, and the two friends embraced before parting ways. Sonic was last to arrive at the shuttle and stated that he would ride on the outside. He informed the Restoration that Tangle had gotten infected and chose to stay behind so that they could escape easily. Though the team were quite upset over this, Whisper became frantic and attempted to run back in the village to save her friend; Amy quickly held Whisper back from going and asked Sonic for help, though the latter knew that he could not do it as he would infect them. Instead, Whisper's Wisps sprung out and pulled her back into the shuttle. Amy then called for a take-off. Sonic jumped onto the top of the Rescue Shuttle and solemnly watched Spiral Hill Village as they flew away.

The Rescue Shuttle arrived at Angel Island, a last resort for a safe haven. Sonic jumped off of the ship next to Knuckles on the pavement in order to prevent the grass from being infected, as his infection had spread so much to the point where only one of his eyes remained its natural color. As Knuckles expressed concern and wondered why Sonic looked like Metal Sonic, the hedgehog did not have time to stop and instead told him that Amy and Tails would be able to explain what was going on to him. With this Sonic ran off around the island. After his run, Sonic returned to find Knuckles confirming that he was now fully up to speed on the situation and expressed annoyance over trouble being brought to his island again. Suddenly, a portal opened of which Eggman, Starline and Metal Sonic dropped out of. As Amy prepared to attack them for everything that they have done, Sonic prevented her act and questioned why Eggman appeared out of nowhere all of a sudden unarmed since he had the advantage. Eggman responded to this by saying Starline brought the Deadly Six onboard the Faceship, which they swiftly took control over. Espio then appeared to inform everyone that they had just gotten word from Rouge. On the shuttle, Rouge reported that Eggman had been powering the Faceship with the Chaos Emeralds, which Zavok had now distributed to the rest of his team and then sent them out into the world; she went on to say that she was coordinating with Orbot to spy on their deployments and coordinate their counterattack. An argument soon arose between Tails and Eggman about a cure for the Metal Virus, to which the doctor clarified that he did not need to have one as his research found that as the Metal Virus mutated, it became unsustainable; soon, every Zombot would disintegrate approximately two hundred years into the future. An injured Silver came onboard and confirmed this claim as it described his current future well.

Later outside, while running on a makeshift treadmill, Sonic and the others tried to come up with ideas on how to counteract the virus. Amy suggested that Sonic could fix the situation if he went Super Sonic but he felt that though the Chaos Emeralds could give him unlimited power, they could not let him just do anything. Eggman instead came up with the idea to use the Warp Topaz, as if they had Super Sonic charge it with his power, they would be able to warp the virus away with one swoop. Starline protested against it due to its instability and decided to leave and create a solution on his own; instead, Eggman, with Metal Sonic's help, removed Starline's glove that had the Warp Topaz attached to it, fired him and had him thrown out via a Warp Portal. Recalling how Starline was the one to bring back Eggman and try to blow him and Silver up, Sonic was okay with Eggman's decision. Following this, Eggman surmised that Rouge would be able to steal the two Emeralds that were on the Faceship from Zavok; Espio noted that it left five Zeti left to deal with, but Silver felt confident that they would be able to overwhelm them so long as they had each other. The group realized that they would have to split up and ambush the Deadly Six all at once since there was a risk that one could contact the others should they get a sense of their plan. While Eggman thought to work on a "Multi-Portal Generator" to help the others reach their destinations, Tails thought it would be best if everyone had a backup in case someone turned into a Zombot; Sonic also noted how he did not know how much fight he left in him. This prompted Amy to call in the Babylon Rogues to increase their numbers. Sonic was unsure of Amy's decision, but she was confident in it as they were perfect for stealing Chaos Emeralds and would have avoided the plague due to staying in their blimp most of the time. Upon their arrival to the island, Jet wasted no time in insulting Sonic's appearance and stated that he may help if the reward was big enough. Sonic turned to his rival and told him that he needed his help, and the world needed the "Legendary Wind Master". Upon hearing this, Jet accepted Sonic's offer to save the world. Amy claimed that she will not tell Knuckles about Sonic boosting Jet's ego, though the hedgehog was accepting his own ego's hits; from this, Sonic set out for another run but promised to be back before deployment so that they could hopefully end things before they got worse.

After returning from his run, Sonic told the others that he had come up with a plan for who will be going with who and what Zeti will they go after. Before he could, his infection had resurfaced, nearly covering up all of his quills in metal, and he felt a sharp jolt of pain. As Amy showed concern for him, Sonic shook it off and continued to devise the plan. As Tails pulled up a hologram of Zomom, Sonic requested that he and Amy take him on as they would be able to outsmart him easily, seeing how the Zeti has very low intelligence. Once Sonic stated that it would be best for Knuckles and Espio to take on Zazz, Knuckles rejected his idea in assisting anyone as it would leave Eggman, Metal Sonic, and Sonic alone with the Master Emerald; since everyone was going to have the fight of their lives and Sonic was weakened and exhausted, no one would be able to keep Eggman from stealing it. Sonic questioned Knuckles' paranoia at first but went with it after remembering their history of working together with the latter and being stabbed in the back in the end; Espio made it clear that he was okay with the change, stating that he had a tactic in mind. Sonic moved on and assigned Silver and Whisper to Zor, stating that he was weird and they best handle him at a distance. Even though it was a huge gamble, he assigned Gemerl to Zeena, telling him to use her high and mighty persona to his advantage. Lastly, he assigned the Babylon Rogues to go after Master Zik, telling them that even though he was old, he was also smart and crafty. Following this, Eggman reminded everyone that Rouge had two retrieve the final two Emeralds on the Faceship which Sonic would use to become Super Sonic to undo the effects of the Metal Virus. He then joked that Sonic may succumb to the virus beforehand, until Sonic reminded him that he life rested on this as well. This caused Eggman to change his approach; he then called on Tails to assist him in building a treadmill for Sonic as his speed was not combating the virus as well anymore.

Soon, when Sonic was running on his new custom treadmill, he turned to Metal Sonic and talked about how Eggman did not get a chance to stay reformed due to Starline. However, Metal Sonic had a choice and chose to go back to Eggman, unlike fellow robots Gemerl and Omega. Eggman stepped into the conversation, asking if Sonic actually thought neutralizing the robot would make him less of a threat. When the hedgehog made it clear that he did, Eggman explained that he only neutralized his hardware but not his software, which demanded battle and conquest; his sole desire from that point on would be to become dangerous again. Sonic pointed out that they did not think anyone could restore him, to which Eggman found him to be right on; however, he did not know about Starline or his return, which had things take a turn for the worse for the hedgehog. Sonic then brought up how Eggman was living happily and peacefully as Mr. Tinker, bringing joy to others and slyly remarked on how it must have been a waste. When Eggman asked when Sonic is going to let that go, the hedgehog responded that it was to be done until he got a clue. Eggman told Sonic not to get too high-and-mighty on him, noting that he helped spread the Metal Virus. Though Sonic noted that he was not dumping gallons of it on people, Eggman clarified that Sonic did fight back the infection for a while and wondered how much it mutated after the failed attempts to remove it; Eggman continued asking how much he spread it fighting Zombots and many miles of infected grass he crossed, or rather caused. Sonic passed Eggman's comments as trying to get into his head and told him it will not work. The doctor did not believe this and told his enemy that he had infected him with a little germ of doubt, noting that even when it was all over, he would not be able to shake it; Eggman dubbed this as his passing gift to the hedgehog. Sonic told Eggman that they would go back to being enemies when it was all over, which the doctor responded saying that they never stopped being enemies and that helping him was just a convenience. Later, as everyone took off on their missions, Sonic wished them luck.

A little while later, Sonic and Eggman saw that the Faceship had arrived at Angel Island, meaning that Zavok had found them. The others soon arrived back on the island with their Chaos Emeralds, except for the Babylon Rouges, Cream and Gemerl. Sonic instead caught the red Chaos Emerald from the Sunset City Warp Portal as indication that neither Cream nor Gemerl was returning, which distressed him. As Amy grew worried, the blue hedgehog stated that she will be fine with Gemerl by her side. He then turned to Silver and told him that the future had already fallen to the infection, meaning that the current events had already occurred but had failed. However, the difference is Silver coming back to their present to help them change the future and he asked Silver to help fix things once and for all, to which the young hedgehog agreed to. Eggman contacted Rouge to hurry up with her mission in retrieving the last two Emeralds as the Faceship drew near every second. She soon flew out of the Faceship with the white Chaos Emerald in hand, forcing the ship to short circuit and fall into the ocean on top of the many Zombots Zavok had led there. Eggman complained that his best effort to date had gone to waste, with Sonic adding that he was glad that the Zombots could survive that sort of damage. Sonic then asked if Rouge knew that the Zombots could survive the Faceship crushing them, to which she replied that she did as she does her research, adding that Sonic was welcome for her help. When Sonic asked about Zavok's Chaos Emerald, Rouge told him that they will retrieve it when the fires die down and stated that the Zeti was not going anywhere; Eggman contradicted this, pointing back down to Zavok who was emerging from the rubble and was heading straight for them. The Zeti proceed to power himself up with his Chaos Emerald, transforming into Giant Zavok; he then shot a fireball from his mouth at the island in anger. Sonic asked Tails and Rouge for air support and told Silver to bring the Chaos Emeralds. Before Sonic could finish his sentence, he and the others were met face-to-face with Zombots that were thrown onto the island by Zavok, some of which were his fallen allies.

Sonic revealed that he had a last-ditch effort plan to get rid of the Metal Virus once and for all. Before taking off, he saw Knuckles willingly punch a Zombot Shadow in order to buy him some time and protect the island. Sonic requested that Metal Sonic help him as well, which Eggman permitted. While Silver carried the Chaos Emeralds, Metal Sonic flew with Sonic. Zavok told Sonic to give up and began throwing hordes of Zombots at them; this did not slow Metal Sonic down as he simply flew around them. Zavok then fired a large fireball at Sonic and Metal Sonic, only for the latter to activate his Black Shield in protection; following this, Sonic remarked that he was glad he and Tails did not deactivate the robot. Zavok tried to grab the duo but was stopped by Silver using his psychokinesis. Metal Sonic attempted to fly Sonic directly to the final Chaos Emerald on Zavok's chest, only for the Zeti to blow them downwards to the Faceship wreckage. On the ground, Sonic found himself surrounded by Zombots. While Sonic planned to run up Zavok's body, the Zombots forcibly grabbed onto him and slowed him down. Metal Sonic soon returned and hit the Zombots out of the way. The robot carried Sonic upward, only for Zavok to use his electromagnetic his powers on Metal Sonic to prevent him from advancing. Nonetheless, Sonic ran up Zavok's body and managed to pull out the Chaos Emerald from his chest while calling on Silver. The force taking out the Emerald caused Sonic to fall. Silver flew to Sonic with the rest of the Emeralds as his infection nearly completed and Zavok clasped his hands around them. With the power of the Emeralds, Sonic and Silver became Super Sonicand Super Silver, with Super Sonic completely burning off his infection. The hedgehog proceeded to beat back Zavok, forcing him into his regular form. With the Warp Topaz in hand, Super Sonic opened up a Super Warp Portal to the sun while Super Silver used his enhanced psychokinesis to remove the Metal Virus from every living infected thing on the planet. When the Topaz began to spin out of control, the duo flew around the planet many times at super speed with to quicken the process. After Super Silver detected that all of the Metal Virus had been sent into the sun, Super Sonic tried ditching the Warp Topaz through the Super Warp Portal. This only backfired and created a large explosion (that Sonic disappeared through), resulting in a green gate of energy to be left in the sky.

The resulting explosion thrust Sonic to Blaze's world, where he crash landed in the garden of the Imperial Palace and fell unconscious. During some tea with Blaze later, it was revealed that Sonic had lost his memory and could not remember what had occurred before he arrived in Blaze's world; he could not even recall his own identity but accepted being called "Mr. Needlemouse" by a young girl that he had met there. Sonic did mention that there was nothing concrete and his memories seemed warped; he dreamed of sea and sky, of golden fire and a sense of falling, and nothing more.

Sometime later, Sonic returned from a run around the island. Upon returning to the Imperial Palace though, Blaze treated him with the power of Sol Emeralds which restored his memories. Back to his old self, Sonic thanked Blaze and asked her to send him back to his world after explaining that he had recently saved it with Silver's aid. As he was being sent home, Sonic suggested to Blaze that she should visit them sometime soon, which she agreed to. Sonic appeared immediately after in a fiery blast in Spiral Hill Village, breaking up the attack Dr. Eggman had launched on his friends with his Giga Omega mecha. There, Tails informed Sonic that Eggman was using Omega as the core of his Giga Omega. Sonic defeated Eggman by attacking the mecha and release Omega, who destroyed Giga Omega. Sonic then announced to Eggman that he would always ruin his plans. He also wanted the doctor to come closer because he wanted to settle some scores with him, one of which included being infected with the Metal Virus. Instead, Eggman flew away, promising him that he would soon have a new scheme ready. Sonic was then greeted by his friends and received a group hug. Afterward, Sonic helped put out the fires in Spiral Hill Village that Eggman had created. As dawn then came, Sonic summed up his latest adventure and decided to head out to find his next one.

Sonic was later resting near Tails' Workshop when he heard Tails talk to Amy and Rouge about repairing Omega, with Tails needing both data and spare pairs to fix Omega. Sonic then jumped in and informed Tails that during one of his runs, he found an old Eggman base near Windmill Village, which they could break into to gain access to data from Eggnet. Initially, Amy wanted to join Sonic, but Sonic discouraged her from coming along by saying that it would be dark, cold and dangerous in the base. While Sonic and Tails decided to head to the base, Rouge decided that she and her group would get the spare parts, which the Chaotrainer Clutch the Opossum might have in White Park Zone. Soon after, Sonic and Tails flew Tornadoto the base. There, Sonic started joking that Eggman had abandoned the base because it was haunted. Regardless, Sonic and Tails soon reached a computer terminal, which Tails went to work on. Meanwhile, Sonic felt uncomfortable being in the presence of the dolls that Eggman had made in Sonic's image.

While waiting for Tails to do his thing, Sonic got bored and tried to tackle a Knuckles doll for fun, but to no avail. Soon after though, he discovered a mysterious robot he believed to be a Badnik and attacked her while trying to figure out her name. When he stepped on her tail though, she kicked him. Tails soon stopped him, however, and calmed him down, explaining that the robot did not look like a Badnik. The stranger robot introduced herself as Belle and explained that she was not the work of Eggman, but a creator whom she was looking for and whose name she did not want to reveal. However, an alarm soon went off in the base because Tails had forgotten to turn off the base's firewall. The heroes were then surrounded by numerous Beats. Since Sonic could not build up momentum to get rid of all the Beats, his only choice was to break down the exit door while Tails covered him. He also asked Belle for help. After some trouble, Sonic, Tails and Belle escaped from Eggman's base and its Badniks. They then received a message from Rouge, who asked them for help in White Park Zone. Sonic thus decided to go there but was hesitant to take Belle with them when she asked for a lift. Ultimately, however, he allowed it as she had saved Tails' life twice during their escape from the base. After reaching the White Park Grand Chateau in the Tornado, Sonic met up with Amy, who told him that the situation was not critical, and that Rouge was acting quite strange. Amy proceeded to lead Sonic and Belle to the suite of Clutch, who was lying unconscious on the floor while Cream and Gemerl tried to free some Chao from a cage. While Belle decided to help Cream open the cage, Sonic ran off to find Rouge and Tails. He eventually found them both, trapped on a moving roller coaster led by a hooded figure. The figure threw a cart at Sonic, causing him to lose balance on top of the roller coaster's rails, but Shadow saved him from falling. The two of them then set off in pursuit of the hooded figure, who turned out to be Dr. Starline. There was then an explosion on top of the White Park Grand Chateau's Mountain, causing an avalanche. Starline then gave Sonic the choice between saving his friends or the hundreds of hotel guests.

Upon Tails' insistence, Sonic decided to stop the avalanche, although he was unable to persuade Shadow to help him. When he got in the way of the avalanche however, Shadow joined him. The two of them then felled nearby trees in order to form a barricade. Despite this though, the avalanche broke through their barricade, prompting Sonic and Shadow to chase the avalanche. After the avalanche had collided with the White Park Grand Chateau, which withstood it, the guests had been led to safety. In the process however, Sonic and Shadow had been buried by the snow. Fortunately, they dug themselves out quickly and received congratulations from their friends. Sonic also apologized to Belle for being too hard on her during their first meeting after hearing how she helped his friends. After returning to the Tails' Workshop, Sonic admitted that things got dicey, but was glad that Shadow helped him.

Sonic and Tails later took Belle to the Restoration's new HQ where they met up with Amy and Jewelto get Belle somewhere to live. While there, they found out that Eggman had built a mysterious tower on the coast that was influencing the weather. Sonic, Tails and Amy thus decided to investigate it. Tangle wanted to go with them too, but she had responsibilities with the Restoration to attend to. However, Sonic consoled her by saying that she could get the opportunity to come along next time. Afterward, Sonic and co. flew to the tower in the Tornado, where they defeated a group of Egg Pawns and blew through the tower's front door. By doing so however, they accidentally fell into a portal and woke up in an unusual corridor. There, Sonic destroyed another Egg Pawn, which for some reason was using a piece of chalk to draw on the walls. As Sonic and his friends tried making their way forward however, they discovered that the corridor they were in was constantly changing. Sonic therefore grabbed Tails and Amy and started to run faster and faster to see if the altering space could keep up with him. When the corridor started to overload, Sonic, with Amy's help, demolished one of the walls in the corridor, causing the trio to fell into a strange space. There, Sonic and Amy were caught by Tails, who hypothesized that the space they were in was a creation of Eggman's where he could bend the laws of spatiality. Sonic and Amy were then taken to another portal Tails spotted, but when they passed through it, Sonic and co. found themselves in an abandoned town. Sonic tried to run around the area, but Tails reminded him that this space was using the same spatial warping as the first one. As Sonic thought about overloading the space again, Amy called them to an open house. There, they found mannequins that they initially mistook for normal residents. Suddenly though, they heard a disturbing noise, which turned out came from a Badnik that was a hybrid of different models. After taking care of it though, other Badnik hybrids launched an attack on the group, but Sonic and Amy managed to defeat them. Upon noticing an army of Badnik hybrids approaching from the window though, Sonic and co. barricaded themselves inside the house. There, Tails came up with the idea of finding an exit by tracking the signals for the incoming Badniks. Suddenly though, Sonic and co. heard Eggman's laughter from the kitchen. There, Sonic found the doctor transmitting to him via the kitchen appliances. Eggman proceeded to inform the heroes that the spaces they were in were used as test chambers for his new robots, and that he would now use this opportunity to test his machines on them.

With a way pointed out for them by Tails, Sonic prepared to take his friends out of the test chambers, only for Eggman to reverse gravity in the test chamber. Keeping Amy from falling into the sky, Sonic eventually let himself and Amy fall into the sky with Tails, suspecting Eggman had prepared something for them, which beat their current situation. Arriving in a dark abyss that materialized into the room, Sonic and co. came under attack by an upgraded Egg Viper, which used electrified shields. Regardless, Sonic managed to destroy it with Tails' help. However, the trio were quickly attacked by three new Egg Vipers, which began to overwhelm them. As the fight progressed, Sonic rescued Tails and Amy, who were surrounded by the fire-type Egg Viper, by directing the water jets from the water-type Egg Viper into the fire-type Egg Viper's flames, extinguishing them. Afterward, Sonic managed, with Amy's help, to damage the water-type Egg Viper. When the wind-type Egg Viper overwhelmed the trio with a gust of wind however, Tangle arrived to help. Sonic and his friends subsequently managed to subdue the Egg Vipers, only for Eggman to attempt to crash the mechs directly into the heroes. Sonic and co., however, evaded the final attack and Sonic got dragged out of the test chambers by Tangle with her tail while Tails Any followed them. Arriving back in the tower, Sonic dragged everyone back to the Tornado, which they used to escape the tower before it imploded from an overloading test chamber portal. After then parting ways with Orbot and Cubot, Belle, who had accompanied Tangle to the tower, revealed that Eggman really did create her, but while he was "Mr. Tinker". However, Sonic's friends consoled her, saying that she had done a lot of good and was not like Eggman.

As Sonic fought Dr. Eggman in Winterburg, he found out that the doctor was tracking the Deadly six. He went into battle with Eggman and beaten him by managing to destroy Eggman's local base. During the doctor's escape, he received a message from Tails, who told him that the Deadly Six were causing trouble again, and according to the Chaotix, they were heading for Sunset Cityand Winterburg. Ready for the challenge, Sonic prepared to face the Zeti in Winterburg. While still in Winterburg, Sonic had a video conversation with the Chaotix, Jewel and Tails over how to handle the Deadly Six. However, when it was discovered that the Deadly Six were attacking Restoration HQ, Sonic quickly ran there and challenged them just before they could break into the control room.

Sonic proceeded to fight the Deadly Six, during which he was supported by Tangle and Whisper. Sonic initially tried to keep the Deadly Six at bay until Tails could arrive with his Zeti Zappers, but was eventually overwhelmed by the group. Fortunately, Tails soon came and saved Sonic, who helped Tails place the Zeti Zappers on each of the Deadly Six, who were incapacitated by the devices. Afterward, however, Sonic heard from Tangle that Belle had been kidnapped by Dr. Starline.

Afterwards, Sonic and Tails announced to the Zeti that they would be sending them back to the Lost Hex in the Zeti Launcher. This confused Zavok, as the hedgehog was still showing them mercy despite their actions, to which Sonic responded that winning was enough and humbling for them. However, Zavok ignored him and told Sonic that he would make him regret this by promising that he would return and make him suffer. This made Sonic remember that his compassion indirectly led to Eggman's return and the creation of the Metal Virus. Despite this, Sonic chose to stick to his principles and promised that he would be there if Zavok ever tried anything. Sonic and Tails then learned from Jewel that there was no news from the Chaotix. Sonic, however, assured her that they would be able to find Belle, but that he would join the search if necessary.

Coming to Tails' lab in Central City, Sonic would help Amy out by packing some camping gear she needed for a trip with her friends in her Pink Cabriolet. Tempted by the allure of nature, Sonic considered coming with Amy's group until Tails reminded him that he had promised to play a video game with him. As such, Sonic decided to stay with Tails. During the following night however, Sonic would mysteriously sneeze while playing Tails' game. Coming to Tails' Workshop not long after, Sonic enviously listened to Tangle and Amy's tale about the adventure they had been on when pulling out a forest fire. As Sonic then inquired Tangle about her next move, she explained that she was going to join Whisper on her travels. After Tangle left, Sonic had a playful conversation with Amy, although he would quietly contemplate about whether the forest fire was a fluke or not.

Eventually, Sonic and Tails were called upon Knuckles to come to Angel Island to help him with a problem. After the duo traveled there in the Tornado, Sonic and Knuckles briefly got into an argument due to Knuckles saying that Sonic brings trouble to his island, and angrily blaming Sonic for bringing the Metal Virus and the Zombots. Regardless, Tails managed to defuse the tension between the two, prompting Knuckles to reveal that he needed their team to investigate some strange quakes in Marble Garden. Sonic thought that meant that Knuckles counted on them, but Knuckles snarked that he counted on Sonic to cause trouble and relied on Tails to keep him focused. Soon after setting out, Sonic and Tails began discussing which way would be the quickest to Marble Garden (among other things) until Knuckles took them down a shortcut through the mountains. While Sonic was impressed by the shortcut, Knuckles would admit that he had only found it recently and that he had yet to explore all of Angel Island. Eventually reaching Marble Garden, Sonic and his team came across Dr. Eggman, who was causing the quakes by recklessly drilling for rare minerals in a drilling vehicle. Following then a few brief exchanges, the trio engaged Eggman and his vehicle. During the battle, Sonic almost got swallowed by a crack in the ground that Eggman made had it not been for Tails, and by working together, Sonic and his friends defeated Eggman's vehicle. After Eggman had then fled from Angel Island, Knuckles declined coming back with them for some R&R and see what had been going on without him, insisting that he still had a lot to discover about Angel Island first. Accepting this, Sonic promised Knuckles that he could count on his teammates if he needed help again.

Sonic, Tails, and Belle soon after began conducting an experiment on lesser Badniks that they had gathered at Tails' Workshop. With the group having isolated the nonaggression subroutines of Motobud, a friendly Motobug that Belle had befriended, Belle would transfer them to the other Badniks, which made them docile in the presence of Sonic after Tails unveiled him to them. Their experiment a success, Sonic assured Tails when he began to worry about recent events that they would be able to handle whatever storm was coming, before heading into the workshop for lunch. Later at night, however, Sonic awoke to find Belle and Motobud under the influence of a control signal. As the possessed Belle tried to punch Tails, Sonic protected Tails and proceeded to occupy both Belle and Motobud while Tails whipped up something to fix this. Eventually, Sonic got pinned down by Belle and Motobud. However, Tails came to his rescue with a prototype Zeti Zapper that blocked the signal controlling Belle. With Sonic keeping Motobud pinned down as well, he learned from Belle that it was a beacon signal controlling her and that it was being used to summon an army of Badniks from everywhere in one place. Since Belle could not recall where however, Sonic and his friends resorted to setting Motobud loose and following it to the signal's source. Along the way, they found people surrounded by Badniks, but Sonic managed to get them out of the robots' hairs. Resuming their chase, the trio eventually reached some woods after hours of pursuit, with Eggperial City just ahead of them. Belle then tried to stop Motobud, which caught the attention of the surrounding Badniks. As Belle then went to work cutting Motobud's power and make the Badniks cease their attack, Sonic and Tails held the Badniks off. After Belle's plan worked and the Badniks resumed their mindless march, Sonic discovered that Belle had found a written confession for her from Mr. Tinker inside Motobud. After Sonic had then cheered up Belle, who chose to come with him and Tails, Sonic grabbed his friends and zoomed towards Eggperial City for an investigation.

As Sonic headed into Eggperial City with Tails and Belle, he and Tails discussed Eggman's odd way of summoning his Badniks. Sonic also offered Belle the chance to sit this out, but Belle was determined. Inside the city, Sonic and his friends noticed Eggman was fighting someone. As Belle then found a deactivated Metal Sonic, Sonic permitted her desire to fix him. As Tails pointed how fixing Metal Sonic last time backfired however, Sonic got dragged away from the scene by a tenrec named Surge. Brought to an isolated site, Sonic nonchalantly tried make introductions. Surge, however, told Sonic of how much she hated him due to his insistence of not killing his enemies in hopes that they would turn over a new leaf. However, due to the continued antics of people like Dr. Eggman and Dr. Starline, she was made without having a choice in the matter. Furthermore, she did not understand Sonic's resolve to keep fighting such enemies but not to kill them, nor did she understand why the worldloved him for that. As such, she said that she would end all of it, believing it was what they all deserved. Though confused, Sonic engaged Surge in battle when she attacked him.

Though their vicious battle kept them both on their toes, Sonic enjoyed this and hoped Surge felt the same way. This infuriated Surge, who insisted this was a battle to the death. As Sonic explain that he had been in similar situations with people who were wronged by the world and wanted to destroy it before, Surge told him that this was who she was. Though Sonic understood this, as he did not know her story, he was not in much of a position to judge and preferred to give Surge a chance to bounce back. Surge believed this to be naivety, but Sonic explained his philosophy and how he wished for everyone to have the same freedom he has; if he ended Surge's life, she would not have the opportunity to do so. However, Surge still saw herself as an outcast that the world had rejected. As such, she agreed with him that she had freedom to do whatever she wanted. However, Sonic made it clear that if she chose to harm anybody and try to take their freedom, he would stop her. As their fight continued, Surge tried to end Sonic when he insisted on not giving up, only for him to trip her and leave her dangling from the edge over a giant chasm. Sonic tried to help her get up, but Surge zapped him as a final hit. Debris from up above then came crashing down, forcing Surge to fall into the chasm. Disappointed over what Surge chose, Sonic returned to the surface where he found Tails, who brought a fennec named Kit with him. Learning that Kit had attacked Tails, Sonic told Tails about Surge's apparent fate. Belle the showed up, having repaired Metal Sonic and returned him to Eggman. As Tails then revealed Starline was behind Surge and Kit, Sonic thought they had to deal with him as well, only for Eggman to announced to him and Tails over the city's speakers that he would give them a proper welcome, just as the city's Badniks surrounded them.

As Sonic, Belle, and Tails, who is carrying an unconscious Kit, attempt to escaped from Eggperial City while being pursued by a massive Badnik Horde. Sonic spots an alleyway and sends the others through before creating a whirlwind to knock away the Badniks. After escaping the Badniks and finding a place to hide, Sonic asks to know what has been happening and why. With Belle explaining that Starline attacked the city with his enforcers named Surge and Kitsunami before summoning the Badniks to get the attention of the heroes and raise an army. She adds that Eggman fought back and that she witnessed Starline's demise herself, which Sonic shows little pity towards.

Tails explains that he was ambushed by Kit, who lost consciousness when his water pack was disabled and has been deeply traumatized by Starline in some way. Sonic notes a similar series of events happening with Surge, with her seemingly being crushed to death after their fight. Sonic asks Belle how she knows so much, to which she answers that she downloaded some data when interfacing with Metal Sonic. After locating a hangar in a nearby district, believing there could be a shuttle there they could use. While Sonic distracted the Badniks out there, Belle, and Tails, who is carrying an unconscious Kit head for the shutter.

Sonic scales a building and calls out to Eggman, attempting to bait him into attacking. However, Eggman catches onto this and instructs Metal Sonic to track down and intercept Sonic's friends, after feeling ignored when Eggman appears behind a screen on a floating satellite, remarking on how Sonic is standing still for once. Sonic tauntingly states that he is able to since there is no threat, at which point the Badniks begin tearing down the building that he was standing atop. Sonic proceeds to fight his way down, bouncing off debris and dodging attacks.

While Sonic continues battling the Badniks, Tails managed to take control of an shuttle, much to Sonic's joy and Eggman's frustration at having it stolen. He then makes a run for the ship, unaware that Metal Sonic is flying nearby to intercept it. Sonic asks if Eggman called off the Badniks or gave up, to which the doctor responds that he did not want to rob Metal Sonic of his moment. To which Metal Sonic bursts straight through the shuttle, damaging it severely and sending it crashing back into the city. Sonic asking if Tails and Belle are alright, which they both confirm, although Belle notices that Sonic has been injured. He asks Tails how much farther they are from being in the clear, to which the fox answers that they were not able to make it halfway to the city limits. Sonic notes that would be a problem as the three look up to see Kit regaining consciousness.

As Metal Sonic looms over them at the site of their crashed aircraft. The robot charges up another attack, prompting them to evade him. The group goes into an alleyway to prevent Metal Sonic from gaining speed. Tails throws Sonic up to a platform carrying boxes and barrels leading Sonic to kick the platform with his non-sprained leg. This causes the rubble to collapse on Metal Sonic and temporarily slow him down. As they reach safe shelter, Kit struggles in Belle's grasp. He asks where Surge is, as he's been gone too long, and she'll be upset that he has been gone. Sonic notices that Metal Sonic has begun to make his move once more and requests that Kit help them deal with the robot. Kit obliges, but notes that his Hydro Pack will need to be refilled. As Metal Sonic blasts out of the alleyway, Kit utilizing water coils to pin him to the ground before breaking apart large crystals in the back, causing the debris falls on top of him.

On the wall surrounding the Eggperial City, Sonic and Belle overlook the setting before Metal Sonic rises into the air, with Sonic keeping Belle behind him. Sonic remarks how low of a blow smacking Belle was and is about to get into a fight, only for an explosion to come from the main tower. He mocks Metal Sonic, telling him to 'run back to Daddy Dearest' to make sure Eggman's okay. Angry, Metal Sonic departs. Sonic checks up to see if Belle is okay, but she does not reply. Tails quickly flies up upon hearing the explosion, Sonic catching him up to speed on what just happened.

After leaving Eggperial City, while at his lab, Tails finishes wrapping some gauze around Sonic's left leg. As Kit returns from putting away the first-aid kit, Sonic begins recounting the events of Eggperial City to him: how he fought Surge and watched her fall despite trying to help her, and how Belle witnessed Starline's demise after he fought Eggman. The news leaves Kit silent and dejected as Sonic apologizes, stating that he did what he could but that they are gone now.

After learning of Surge attacked in Central City, Sonic and Tails head out. As Surge has another hallucination of Starline, Sonic and Tails then arrive on the scene, the former of whom is shocked to see Surge still alive yet disappointed that she has not changed her ways. As Surge uses the Orange Wisp's power to launch an attack at the surreal Starline, Tails takes Whisper to safety while Sonic confronts Surge.

As their fight with Surge continues in Central City, while carrying Sonic, Tails admits they may not be able to keep this up, but Sonic states that they need to so that Surge's attentions stay on him rather than the rest of the city. Surge rushes them with a Spin Attack, knocking them out of the air and onto the ground, the impact of which causes Sonic to hurt his leg again. As Surge taunts him, Whisper whistles for their attention and uses multiple prisms to send her Cyan Wisp to Sonic, allowing him to absorb its power and use the Cyan Laser. As he blitzes Surge with a barrage of attacks, she puts up a shield using the Blue Cube Wisp ability, giving her time to figure out where he will strike from next. From there she manages to grab Sonic mid-attack and separate him from the Cyan Wisp, taking its power for herself.

As Surge absorbs the Wisp's power, Sonic pleads with her to stop saying she's hurting the Wisps. Surge tells him she doesn't care and is tired of his grandstanding. Tails then gets Sonic's attention and leads him into a hardware store. As Sonic hides, Surge breaks into the store by shooting lasers out of her eyes with Cyan Laser. As she walks over to Sonic, she slips over on some screws. As she looks up in anger, Sonic puts a bucket on her head and makes it to the appliance section as she tries to take it off. Sonic comes down to see Tails has hooked up a bunch of appliances to jumper cables. Surge then makes it and Tails attaches the jumper cables to Surge, causing the power to transfer from the Dynamo Cage to the appliances. Before the appliances can drain her energy, Surge lets out a blast of energy destroying the room. Surge passes out, and Sonic and Tails come out from cover to take the Dynamo Cage off. Sonic tweaks his ankle and goes down, and as Tails goes to Surge, he sees Kitsunami looking over them, who left the lab to help Sonic.

Shocked, Kit goes down to check on Surge. Sonic pleads him to take off the Dynamo Cage. Kit tells Sonic he told him Surge was gone. Sonic says he thought she was, as he saw her fall when they first fought. Kit says Surge is hurt bad, and before Sonic can explain himself, Kit attacks Sonic with his water coils. Kit tells Sonic he understands he lied to him so he could finish off Surge. Kit says he won't let him and attacks him again, but Tails flies in to stop his coils. With hate in his eyes, Kit rhetorically asks why Sonic would bother to help him when he has Tails as a friend. Before Kit attacks again, Surge stirs awake. Kit then goes to pick her up and take her out of the shop. He tells Sonic and Tails not to follow them. Back at Tails' Lab, Sonic and Tails free Belle from being trapped in the lab before going to follow Surge and Kit.

The duo eventually find the base after following Surge's energy readings. They carefully approach the entrance, when suddenly Metal Sonic attacks Sonic from behind and drags him into the base. While fighting him, Sonic tries to get into his head by asking about the hesitation he had with attacking Belle. Just as Metal pins him down, Tails comes in to help. Later in the fight, Metal hears a noise and senses Eggman is in danger and runs off to his aid. Tails is concerned Surge has discovered them, but Sonic says they have to go, and the duo follow Metal. Sonic arrives in time to stop Surge from fighting Eggman and Metal. Sonic pleads for her not to make things harder than they have to be, but Surge then retreats into the rafters.

Sonic demands and explanation for why Eggman is here. Eggman says he is here to reclaim his Dynamo Cage. Sonic and Tails talk in private for a moment, agreeing that fighting both Surge and Metal would be a major risk. Sonic says Surge is the bigger enemy right now and he can destroy they Dynamo Cage during their fight. Sonic proposes to help Eggman against Surge, as long as they don't double cross them. Eggman is disgusted by the idea, but he agrees to a truce seeing their support as useful. Sonic is concerned Surge is following them, to which Eggman says she will likely go after them first and he and Metal won't help if that happens.

They soon stumble into a dank lab and Tails finds documents showing Dr. Starline's plans for Surge and Kit. Sonic realizes Surge and Kit are creations of Starline. Eggman reaffirms this and says Starline was successful with his venture. Sonic implies Eggman is impressed by the work, and Eggman admits it and praises his former assistant intellect. Tails disproves of Starline and blames Eggman for it happening, saying all he to do was recognize Starline's brilliance. Eggman admits this but says he would never do it, reasoning that admitting the skill of Starline after his demise only improves his own brilliance. Sonic says he's heard enough and walks into another chamber.

Sonic calls out and says he knows Surge and Kit are watching them. The two impostors reluctantly come out from the shadows. Sonic offers them to hand over the Dynamo Cage and they will leave. Surge and Kit look at each other, then get into a battle stance, with Surge saying it's not up to him. Sonic, Tails, and Metal Sonic then start their battle with Surge and Kit, with Eggman watching from the sidelines. Tails and Kit take on each other as Metal Sonic and Sonic fight Surge. They have control of the fight, but Surge uses a fake attack on Eggman to grab Metal and hit Sonic away with him. Metal Sonic then traps Surge with his Black Shield, but she absorbs Metal's power using the Dynamo Cage. Surge then charges at Sonic with Orange Rocket, but he gets out of the way, causing Surge to break some tubes and flooding the floor. Eggman tells Sonic to get out of the water, making Sonic think he's insulting his swimming ability, but Eggman grabs him out of the water so Surge doesn't electrocute him. Eggman lets him go and says the Dynamo Cage will overload and he needs to keep her busy as he repairs Metal.

As Surge continues to attack Sonic, Sonic tries again to plead with her to stop. Surge makes it clear she's only interested in killing him. Sonic reasons that since Starline is gone, she doesn't have have to kill him anymore. Surge says she can't and gets Sonic to fall into the water again. This time she zaps him and holds him down, yelling that she will never be free while he is still alive. Before her shocks can do any serious damage, the Dynamo Cage overloads and breaks, letting the Wisps get out and causing Surge to pass out. Sonic gasps out of the water as he looks again on a defeated Surge. Tails helps him up and Sonic is still in good spirits. Eggman then commands Metal to take Surge and the Dynamo Cage. Sonic says that wasn't the deal, but Eggman retorts Sonic wouldn't hold his end of the deal. As he braces for Metal, Kit attacks Metal with a jet of water. Sonic thanks Kit, but he then wraps him in his water coils and takes Surge to him. Kit starts to destroy the room and says Sonic just wants to help Surge and him to prove his worldview is right. He says he will be with Surge and leaves while the room crumbles. Tails starts to fly Sonic out, but rubble hits the fox and Sonic uses his speed to get to the top of skylight. He reaches to it and hangs on by a thread, but Tails grabs on as well and the climb out.

Sonic is unsure what to think of the situation, but is not surprised to see Eggman and Metal alright. As he looks angrily at him, Eggman asks to continue the truce till they return home. Sonic reluctantly agrees as they need to get the Wisps back to Whisper.

Sonic and Tails fly across an ocean with the Tornado during a storm. Sonic spots the wrecked remains of the original Death Egg on an unknown island as they search for somewhere to land. The Tornado is then struck by lightning, causing the plane to hurdle to the ground. A while later, Sonic wakes up with a headache and finds himself in a room full of broken Badniks. He calls out for Tails and gets off the table he woke up on. However, as he lands down, he finds a metal brace on his ankle and yells out in pain. Sonic doesn't remember who put it on him. On another table, Sonic the Miles Electric, noting it isn't like Tails to leave it on its own. Sonic leaves the room and calls out to Tails, unaware of the Badniks that started to move after him. Using the Miles Electric's flashlight to navigate his way around the ruined Death Egg, Sonic is amazed by the decay of the ship. The hedgehog figures he must have blacked out after the crash.

Sonic limps onward and continues to call for Tails and discovers a room with a sunflower in a Containment Bubble in it. Before he can touch it, he hears something outside the room and goes to see if its Tails. In another room, Sonic finds the remains of the Egg Carrier. Hearing a screech behind him, Sonic turns scared and shine a light on what's behind him. It turns out to be an old Coconuts Badnik, much to his relief. However, the Crawls forward with a Caterkiller body. Several other Badnik amalgamations emerge and surround Sonic. He starts to think he's in a nightmare and backs into a rusty Mecha Sonic. Sonic prepares to fight the robots, only for the pain in his ankle to shoot through him. Sonic uses a Spin Attack to duck out of the group and tries to run off. However, due to his injured ankle, he can barely run and the robots pursue him. Sonic tells himself he needs to find Tails to get out of the Death Egg.

Sonic hides himself in a Capsule to hide from Mecha Sonic, but the old robot finds him and opens it. Sonic uses the door of the Capsule as a board and rides away from Mecha Sonic, taunting him. Sonic is them swiped off the board by an E-100 Series robot. From around the same corner, Tails appears and more Badniks come out to gather around the pair, causing Sonic to put his guard up. However, Tails tells Sonic that the robots are actually friendly. He explains that the "Scrapniks" helped drag Sonic inside the Death Egg after they crashed and built the metallic brace for him. The E-100 robot introduces himself as E-117 Sigma; it explains that Sonic was placed under observation due to the ankle injury he sustained and guesses that Sonic's lack of knowledge about the situation raised his stress levels. Sigma says that their intention was not to frighten Sonic and apologizes for their behavior, which Sonic accepts.

Sigma leads Sonic, Tails, and Mecha Sonic to the surface, saying the storm is likely over. It asks for forgiveness for the crashing of their plane as it was their fault; the Death Egg's climate disruptor was malfunctioning, and Sigma has been unable to fully repair it. Sigma says that they can make their home their own until the Tornado is fixed and introduces them to Scrapnik Island, a civilization made from recycled machines and spare parts. Tails shows excitement over the whole area and follows Sigma to be shown more around the place. Sonic finds Tails' excitement amusing and shoots Mecha Sonic an suspicious glare. He walks off to catch up with Sigma and Tails as Mecha Sonic watches.

A little later, Sonic relaxes on the beach while Tails messes with the Miles Electric. A Scrapnik comes up to him and he says hi to it. Sonic is shocked when he hears it say hello back. Tails explains he created a translator module with his Miles Electric and the Scrapniks can speak through the speakers of his tablet. Sonic is impressed by it, as is Sigma when Tails shows it to him. Sigma tells the duo the Tornado most of the damage to the airplane is superficial except the integrated drive generator. Tails tells Sonic it makes power for the plane and they can't fly without it. Sigma says he can find a spare in the Death Egg and Sonic volunteers to help. Tails objects to it, saying Sonic needs rest. Sonic appreciates his concern, but assures he is fine and doesn't want to sit anymore. Sigma reassures Tails he and the other Scrapniks will make sure Sonic is OK. Sigma leaves his helpers to Tails to repair the Tornado and he, Sonic, and Mecha Sonic leave to the Death Egg.

They stop to the sunflower Sonic saw earlier and he asks Sigma what's the deal with it. Sigma says it washed ashore one day and Mecha Sonic has taken care of it ever since. Sigma also says they all wish they could leave the island, along with their shameful Eggman origins. Sonic playfully elbows Mecha Sonic, saying he's a big softy and they'll get off the island one day. He nervously smiles at the robot, but Mecha Sonic gives him no acknowledgment. They stop by the Egg Carrier, with Sigma calling it the Scrambled Egg Carrier. he states they are working to reconstruct it so they can evacuate the island. Sonic cracks a joke, saying he didn't get a good look at it since the "scared the scrap outta me". Sigma laughs and he splits off from the group, leaving Mecha Sonic and Sonic together.

Later, Sonic finds a moment to apologize for getting off on the wrong foot with Mecha. He says he's chill now and is moving forward about his past, unlike another robot he knows. Sonic offers to put their transgressions behind them and holds his hand out for a handshake. Before Mecha can shake it, he hears someone coming and pulls Sonic away from an attack from Mecha Knuckles. Sonic is surprised another robot copy is on the island, but Mecha Sonic runs away while holding Sonic before he can say anything else. They reach where Sigma is and Sonic asks what is up with Mecha Knuckles. Sigma explains he had to change his directives from defending the Master Emerald Shrine to defending the Scrambled Egg Carrier. Sonic calls the robot a blockhead and Sigma tries to make Mecha Knuckles stand down. He instead knocks Sigma out, causing Sonic to cry out.

Sonic then gets out of the way as the two robots fight. Mecha Sonic is knocked down and Mecha Knuckles closes in on Sonic. He tries to talk it out with him, but Mecha Sonic awakens and knocks out the robot. Sonic compliments his robot copy on the save, saying it might of been overkill, and offers a high five. Mecha Sonic then rushes at Sonic and hold him up by the neck. Sonic is brought into another room and strapped to a table. Mecha Sonic puts a device on his head and starts up the computer in the room. Sonic says he's getting tired of the people he gives the benefit of the doubt betraying him. He asks why Mecha threw away his second chance. Mecha says nothing and the monitor of the computer shows Tails and the Scrapniks working on the Tornado. Sonic asks why he has something on his head and rhetorically asks if its "gonna suck his brains out". Mecha Sonic turns to Sonic and gives him a cold look. Sonic starts to think Mecha will actually do that. Mecha Sonic leaves Sonic to confront Tails and the other Scrapniks trying to stop him.

After Mecha Sonic defeats Sonic's rescuers, he returns to the room and Sonic sees he has the Miles Electric. He demands to know to know what he did to Tails. Mecha simply says he's "where he belongs" and hooks up the device to the computer. Mecha prepares for a mind transfer and Sonic asks what he is talking about. Mecha explains the device he's wearing was made by Eggman to control Badniks with his mind and he has modified it so he can download his own mind into Sonic's body. Sonic is shocked Mecha is actually going to suck his brains out and asks if he's serious. Mecha Sonic says he is and the only way for him to escape the island is take use Sonic's body to run across the sea. Sonic asks if he is going to ditch Sigma and the other Scrapniks like Eggman ditched him. Mecha states his friendship with them was an error in his program and they were never his friends. Sonic tells Mecha he's full of it and doesn't mean it. Mecha ends the conversation and starts the transfer process.

Sonic riles in pain as Mecha's mind is implanted in him. A group of Scrapniks, who were watching in the shadows, attack Mecha and destroy the computer. Two of them release Sonic from his restraints, who hears another voice in his heads. He feels like someone's memories and feelings are being shoved into his head. He realizes Mecha Sonic's feelings are now connected to him. Sonic looks on and sees Mecha attack a Scrapnik. Feeling his anger, Sonic lets it out by attacking Mecha. Sonic runs along side the robot copy as he feels sharp pain in his broken foot. Mecha can hear his thoughts and says Sonic doesn't know pain like he does. Mecha admits he defeated him before, but he will win this time since this time he is injured and alone. Sonic lets out a smile and tells Mecha limits were meant to be broken and Super Peels Out in front of him.

The two fight along the rim of an active furnace and Sonic eventually gets and open hit on Mecha Sonic by kicking him with his bad foot. Mecha falls into the scrap pile and Sonic goes down to help him out. Mecha Sonic smacks his hand away and tells Sonic he is a useless failure and deserves to be destroyed. Sonic tells him to cut the crap and you give yourself value and purpose and you have to live for you to be free. He holds out his hand again and this time Mecha grabs it. Sonic tries to pull Mecha out with both hands but he realizes he can't move with bad foot at all now. Mecha says he said all that big talk for nothing and Sonic says he's working on getting them out. Suddenly, Tails grabs Sonic's other hand and jokingly says he should of stayed back to rest. A daisy chain of Scrapniks, with Sigma and Mecha Knuckles at the end, start to pull them out of the furnace.

After they got out, Sonic watched on as Mecha Sonic reunited with the other Scrapniks. Sonic them started to cry, but after Tails asked if he was, Sonic said it wasn't his own tears but Mecha's. Soon after, Sonic was there to see Tails remove the Eggman programing out of Mecha Sonic and Mecha Knuckles. Sigma patted the duo and said the Scrapniks will never forget all they have done for them. Sonic smiled and said it was all in a day's work. Later, Mecha Sonic thanked Sonic for helping him realize what matters in life is having the courage to keep moving forward. Sonic then joined Tails on the repaired Tornado and they flew off the island back to Restoration HQ.

Sonic would inform the Diamond Cutters he'd meet up with them to head to Eggperial City. Sonic and Tails soon arrive with Sonic apologizing for the wait and says they had a few Badnik's to pummel and Tangle responding saying how she could've benefited but Tails reassures there will be plenty of Badnik's in Eggperial City and they hero's leave.

Sonic arrives in a meeting room to see Jewel at Restoration HQ, saying she needed a favor. Tangle, Whisper, and Lanolin are also in the room and Sonic says hi to them. Jewel says Lanolin has a plant to expand the Restoration's efforts beyond rebuilding a humanitarian work. The sheep explains they are making a rapid response to take the initiative against any threats and Tangle and Whisper have volunteered to join their squad. Sonic asks Whisper if she is alright after dealing with Surge, and she tells him she's fine. Sonic asks what the favor is and Lanolin says they have heard about him visiting Eggman's new base and she wants to take the team there to figure out how to take it down. Jewel asks if he can lead the group since he has experience and expertise with Dr. Eggman. Sonic says it sounds fun and agrees. He then pulls Lanolin aside and says he doesn't think they have meet before. Lanolin explains he saved her town of Riverside and he inspired her to join the Restoration. Sonic shakes her had and says its a pleasure to meet her again. He asks when they are leaving for the mission, and Lanolin says as soon as he's ready.

When they arrive outside the Eggperial City, Sonic and Tangle rush right in after Lanolin and Whisper scope out the area. Sonic and Tangle began fighting some Badniks and Whisper and Lanolin soon join them. After taking care of the Badniks, Lanolin yells at Sonic for rushing in. Sonic says "slow 'n' sneaky" isn't his thing. After an exchange with Tangle and Whisper, Sonic asks if they should keep going into the city. Lanolin says they should assess their surroundings first. Whisper uses her Green Wisp to take up a device to overlook the city. Sonic asks what she found out and Lanolin says she can confirm the city has gotten bigger. Tangle and Lanolin are confused on how that's possible since there isn't any construction equipment. Sonic says he has an idea and transforms into Green Hover, overlooking the city and seeing the spot where Metal Sonic wrecked their escape plan the last time he was in the city. Sonic returns and says the spot is repaired and it's unusual for Eggman to clean up after itself. He says somehow the city is able to heal itself. Lanolin asks how, and Sonic tells her he doesn't know.

Lanolin says the city has to have resources to fuel its construction. Sonic says he didn't see any of Eggman's mining equipment. Tangle suggests they are mining underground because the trees around the city were in bad shape. Sonic remembers Belle saying there was a whole network of tunnels under the city. Lanolin tells the group to move to the tunnels cautiously. They reach down to the tunnels on an elevator and stealthy take out some Badniks. Eventually, they reach what seems to be the lowest point of the tunnels. Whisper blows a hole at the bottom of the tunnel and Lanolin rappels down with Tangle into the hole. They exit and tell Sonic it was an empty, stripped-mined hole. Sonic sees Eggman's plan: he will keep expanding the city until the entire planet is converted. Lanolin says they have to get back to HQ to rally the troops to take down the city. Sonic then suggests for them to take down the city themselves since they are already in it and know where Eggman is. Lanolin is against the idea, saying its too dangerous and their team is untested. Sonic reminders her the city will grow as they marshal more troops. Lanolin replies saying it will grow unopposed if they get taken out today.

Their argument is cut short as a device arrives in front of them that generates a portal. Tangle remembers the portal from the Eggman Tower that took Sonic into a simulation. Sonic tells them they don't want to go through that portal and they run off. Tangle grabs Sonic's hand and grabs Lanolin and Whisper with her tail. A group of Badniks appear on the elevator to stop them and Sonic warns them that things are about to get bumpy. Sonic jumps and runs up the shaft with the rest of the group fighting off Badniks. Just as they reach the top, a Zoomer breaks Sonic and Tangle's grip, causing Tangle, Whisper, and Lanolin to fall into the portal. Sonic is able to get away, but a group of Badniks surround him. He then runs into a building and calls for Jewel on a wrist watch. Sonic says they are in trouble, he's surrounded, and needs some help.

Sonic holds off off more Badniks and then sees Silver and Blaze show up to help him, followed by Tails and Amy. Amy holds him and says Jewel called them for backup and asks if he's alright. Sonic says he's fine and appreciates them coming to help. He apologizes to Blaze for interrupting her vacation, but she says to think nothing of it and Silver says he's happy to have some direction. Tails asks where the Diamond Cutters are, and Sonic explains how he lost them and what the city is doing. The group considers their options and decide to get over to one of the giant crystal so Tails can investigate. Sonic leads the way as they clear a path to a crystal. They keep Tails covered as they fight off Badniks, with Silver using his powers to fling Sonic around Badniks. Sonic high-fives Amy after she used the hammer of a Egg Hammer Super Badnik.

With a calm in a wave of Badniks, Tails explains the crystals are actually Giant Fake Chaos Emeralds. Sonic asks why they are so big, and Tails explains it is to increase their power output. Sonic suggests destroying them, but Tails says not to as that would blow up the city block and themselves, causing the city to grow more. Sonic throws out an idea to destroy the entire city by themselves, but Tails explains the command tower is powering all the emeralds. Sonic gets that they need to destroy the central tower to stop the city. Tails flies by him and says they need to reverse the energy of the command tower to save their friends first, which Sonic thought was given. Silver flies by and says his work needs a delicate touch and Sonic smugly grins at him. Sonic thinks to himself that Lanolin was right and this is a lot easier with help. He thinks solo missions are fun, but doing it as a group is also fun. His thought is interrupted by an explosion in the city. Amy asks what that was and Sonic tells everyone to head for the tower while he and Tails check it out.

The two arrive at the explosion site and Sonic asks if Jewel was sending more help. Tails says none that he knows of and they look to see who arrived; surprised to see Team Dark fighting Badniks. As Silver and the others return, Sonic tells Team Dark he is flattered for them to come save him, but they are "late to the party". Shadow walks past Sonic saying he has no idea what he's talking about and he doesn't care. Rouge leans on Sonic and tells him they are here to see what could do to destroy Eggperial City. Sonic isn't convinced, neither is Amy and she pushes Sonic aside to pressure her to tell the truth. Rouge fesses up she wants to take anything interesting she finds, such as what's inside Eggman's private vaults. Tails and Silver suggest for them to team up so they can take out the city. Omega says the conversation is irrelevant to their mission and Rouge coldly tells the other heroes they will only slow them down. Sonic doesn't think they would slow down if they work together, but Blaze tells him their efforts can only help them even if they don't work together.

Eggman then "welcomes" the heroes over the city's loudspeakers and releases a horde of Shadow Androids to take them out. As the Shadow Androids began their attack, Sonic ask Tails what they are dealing with. Tails says he doesn't know because the robots are moving too fast for them to get a clear reading. The group struggles to fight them and Sonic says they need to leave. Sonic asks Silver to make a ramp and Silver raises the ground ground to make one. Sonic then launches off while holding Amy, Tails, and Blaze. As they launch off, Silver notices Team Dark and Sonic says they are holding their ground. He thinks if they join forces, they can get an upper hand. Blaze then grabbed a hold of Sonic and Amy and dashed them closer to Team Dark. Blaze then threw Sonic and Amy down onto the androids in front of Shadow. Sonic, Amy, and Shadow then fought off more Shadow Androids as the whole group gathered together. After Omega was forced to the ground by the androids, Tails and Rouge convinced Shadow to use his Chaos powers to take out the androids via the Giant Fake Chaos Emeralds.

Using Chaos Control, Shadow eliminated the Shadow Androids that surrounded them. The group cheered Shadow on, with Sonic considering to use the powers himself. Shadow told them not to celebrate yet and then felt a sudden surge in energy. Giant Fake Chaos Emeralds started to grow out of the ground with the group being tossed up. Shadow screamed as a beacon of Chaos Energy is shot out of him. The group ran off as Giant Fake Emeralds started to pop out everywhere. The group, minus Shadow and Omega, looks over the city from a building. Sonic goes to comfort Rouge and says Omega and Shadow are tough. Rouge shakes and says she knows. Silver says that now that they know what they are up against, they can take it out. Blaze agrees and says they won't be away from their friends for long. Rouge appreciates Sonic's chipper attitude and Sonic says he can't wait to see Shadow's face when they save him.

Sonic then listened as the group planned their next move. Suddenly, Tangle appeared and Sonic looked on curiously at Tangle's ability to phase through objects. He asked Tangle if the trap the Diamond Cutters did this to her. Tangle says yes and the other Diamond Cutters are still stuck. She yells at Sonic to look out as he dodges a Spatial-Displacement Trap. Metal Sonic flies in with more traps and Sonic starts to fight him. Sonic recognizes the green light from the trap as the same light from the trap that got the Diamond Cutters. Silver disposes of a trap and the two get ready to fight Metal, but Amy destroys the building bellow Metal before they can do anything. The group then splits up with Sonic joining Amy, Tails, and Tangle in breaking into the control room of the central tower to disable the safeguards for the city's power grid and free the Diamond Cutters. The elevator they are on then stops and they see Metal Sonic cutting the elevator's cable. Sonic grabs onto Tails and they fly up, but Metal grabs Sonic and pulls him down. Tangle then gets on Metal and covers his eyes, allowing Sonic to spin jump up the shaft.

Sonic runs into the control room with the group, taunting Eggman while he does. Sonic then starts to battle Metal again, but he is unimpressed by his fighting moves. Sonic calls out in shock to Amy after Eggman shoots her hammer away, which allows Metal to punch him hard in the face. He's knocked down for a moment, but Tails manages to override the computer's systems and the Fake Chaos Emeralds start to grow out of control. Dr. Eggman resorts to making his central tower mobile, causing Sonic and the others to lose their balance. Sonic gets up and tells Eggman he hasn't won yet. Sonic lunges to fight Eggman, but he is then caught in a Spatial-Displacement Trap. This doesn't last for long. Thanks to Tails making the city's computer systems offline, Sonic and the other Diamond Cutters are freed from their traps. He returns just in time to stop Metal Sonic from attacking his friends; kicking him out of the tower. Sonic then crushes the gun Eggman was using and tells him he took things too far. Sonic then leaves with Tails and Amy to destroy the city. Before they can make it to the Fake Emerald tower Shadow created, Sonic is grabbed by Metal Sonic, who is riding a Turtloid. Omega and Blaze fire at them and Sonic tells Metal he needs to learn when to quit as he throws them into their fire. He is brought down safely by Rouge as Shadow traps the central tower with the Fake Emeralds. With the help of nearly all his friends, Sonic is flung into the air and at the central tower, ignoring Eggman's pleas for him not to. He falls to the group with Tangle and Whisper just as Shadow teleports the Fake Emeralds into the sky. He watches in amazement as they explode far above them.

Later, Sonic joins a celebratory picnic with the Restoration, but runs off before Amy can serve him cake.

Sonic visited Tails behind his lab in Central Cityand invited him to hang out with him to enjoy good weather. However, Tails was busy modifying the Tornado and asked Sonic to check if Restoration HQ's metal shop had a part he is missing. While passing through the HQ, Sonic came across Jewel and learned that her hard work was causing her to miss time with Tangle and Whisper, who had been busy with their own missions and training as the Diamond Cutters, causing Jewel to feel left out. She pretended that everything was fine and returned to doing paperwork. Sonic left to collect the missing part for Tails. However, he got an idea and rushed back to Jewel's office, telling her they had a very important mission.

Soon after, Sonic, Jewel, Tangle, Whisper (along with her Wisps) arrived at a beach near Green Hill. Jewel was initially unimpressed, but Sonic told her that if she pushed herself too hard and held back her feelings, she'll get burnt out and be unable to help anyone. Jewel thanked Sonic and joined Tangle and Whisper in the water. The four of them later play a game of volleyball, during which Tangle lost the ball and Jewel found it near the Babylon Rogues. Sonic came over and asked what the holdup was. Jewel tried to shush him but they got discovered.

The two groups stared each other down and got into an argument how to share the beach. Jet said Sonic would ruin their vibe, but Sonic retorted he was "all-vibes". Wave proposed that they settle it with a tournament involving beach games, with the winning team being the one that got to stay. The first round was Disc Catch, which was won by Team Sonic. The second round, Swim Relay, was won by the Babylon Rogues. Team Sonic won the Sand Sculpting round, while the Rogues won at Surfing. The final round was a game of volleyball. As the teams continued playing, Jewel began feeling left out again. Sonic gave the team a quick pep talk as the end of the game drew near, motivating Jewel enough for her to form a plan.

The plan involved isolating Jet and exploiting his ego by keeping Wave and Storm away from the net, thus making Jet feel left out, and then creating a false opening for him, allowing Team Sonic to score. With the last point being scored by Jewel, the game was won by Team Sonic. While they cheered and celebrate, Jewel notices the Babylon Rogues leaving and began to feel bad. She decided to let them stay and the three teams enjoyed the rest of the day at the beach eating marshmallows over a campfire, with Sonic showing his preference to burnt marshmallows.

Sonic visited Tails in one of his labs, where his buddy was recalling their past adventures. Sonic asked if he was feeling nostalgic and Tails said he wanted to figure out how many times Sonic saved the world. He finished his countdown and reached 899 times. Sonic reminded him his victories were a group effort. Sonic did take credit for supercharging the Warp Topaz to end the Metal Virus, and at that moment, the Topaz warped right beside him, much to their surprise as they assumed it was destroyed. Tails analyzed the Topaz and discovered it still supercharged from the Chaos Emeralds. He detects the gemstone will cause a cataclysmic amount of damage if it overloads again. Sonic asked what they need to do, and Tails said they could neutralize it if they put it back where Starline found it. Tails warned him if he takes too much of its unstable energy, he may not come back the same. Sonic said they can figure that out on the fly, and he'll guide him as always. Tails checked if Sonic had his wrist-comm on and Sonic grabbed the topaz, warping out of the lab.

Sonic wound up in Green Hill and Tails said he will see someone nearby could help him. Later, he called Tails and asked what the gemstone will do. Tails told him to expect lots of portals to open up and objects to appear out of them. One of the portals that appeared brought out a road from Dragon Road into Green Hill. Sonic raced around the road, only to come face to face with an Orcafrom one of the portals. Amy then came to Sonic's rescue by hitting the Orca with her hammer. The Orca crashed into the road and Amy to fell with it. Sonic grabbed her hand and they rode the fin of the Orca. Sonic explained they have to get the Topaz as far away from him as possible to stop portals from appearing. Amy said its doable, but was worried about the Orca. Amy came up with a plan the involved Sonic running on the water to get the Orca's attention. He made his way up a tall island and threw the rock at Amy, who swung it away with her hammer as the Orca jumped to get Sonic. The Orca went through the portal behind Sonic and he and Amy slid off its back into the water. Later, they made it to shore and Sonic asked her to make triple chocolate chip cookies for all the trouble. He was about to leave to get the Topaz, but Amy pulled him for a hug, wishing him good luck and telling him to save the world. Sonic thanked Amy and ran off.

Soon, Sonic wound up running in a desert with the Warp Topaz. Tails told Sonic Knuckles is really close to him now. Sonic saw him and thanked him for leaving Angel Island to help. Tails told Sonic he had to get rid of the Topaz right now because the readings were going off the scale. Sonic tried to hand it to Knuckles, but he was warped away before he can. Sonic was then warped to a lab. Metal Sonic was in the lab and with Sonic seemingly too weak to stop him, Metal picked up the Topaz. Tails demanded Sonic to get out of there with the stone, but Sonic insisted he was too weak. Sonic plead with Metal to put aside their differences and give the Topaz to him so he can dispose of it. Metal thought for a moment and smacked Sonic to the side.

The hedgehog started to sound weak and defeated as he cowered behind a computer. Sonic then gave up the act and said that was probably enough time for Metal to have the Topaz. Tails got very confused and Sonic explained since he couldn't give the Topaz to Knuckles, giving it to Metal was the next best thing and he played weak to trick him. Tails praised his idea and said the effects of the Topaz wearing off him quickly. Sonic saw the Topaz making a new portal and Sonic quickly grabbed Metal into it. They wound up back in the desert, exactly where Sonic wanted. Tails said Sonic was learning how to control the Warp Topaz and Tails said he thinks the Topaz is going to a cave. Sonic told Metal to head back to Eggman before he gets mad and taunts him with the Topaz in his hand. As Metal leaves, Knuckles tells Sonic to hand him the Topaz and explain why Metal was here later. Sonic said he changed his mind and he'll hold onto the Topaz. The echidna gets angry as Sonic ran off. Tails told Sonic that wasn't funny and asked if he was going to tell Knuckles he didn't need to hold it since Metal did. Sonic said he would, eventually.

Sonic then winds up in an abandoned city where Eggman is testing a new mech robot with Orbot and Cubot watching by. The Topaz ended up in Cubot's, but he was unable to use it. Sonic tried to take it from them and Eggman used the mech's sword to attack Sonic, cutting his Eggmobile and a building in half. Sonic teleported somewhere else and Eggman tried several times to hit him, but Sonic managed to get the Topaz and get Eggman to hit himself. Eggman had enough and launched a barrage of rockets at him. They blew up in the air, but Sonic managed to hitch a ride on one and redirected it via a portal to Eggman. The rocket hit the mech, but didn't do much damage. Sonic, now on top of another building, said he would love to destroy Eggman's robot, but he is too busy saving the world and leaves via a portal.

Sonic ran into a colorful desert as he looked for someone to pass the Topaz to. He ran into Blaze, who was out sightseeing with Cream and Cheese. After he meets up with them, Cream confessed she wanted to join Sonic on his adventure even though it's dangerous because she didn't want another bad doctor to use the Topaz for evil again. Blaze and Sonic were taken aback by her outburst, but Sonic made a quick decision and lets her join, seeing her mind is made up. Sonic tosses the topaz to Blaze, which causes them to warp to Tropical Jungle. Sonic started to think on how to get back on track, but they were teleported again to Water Palace. Blaze was teleported to Monopoleand looked through the portals to find the others. She then warped to Red Mountain, and after some thought, she heard Cream calling out to her. She turned to see Sonic and Cream over a lava pool and jumped to help them, creating another portal. The portal caused them to free fall in the sky. Sonic held the Topaz with Blaze and explains if they focus, they can guide where the portal to appear. They focused on the gorge from earlier and a portal to it appeared. Cream tried to get them there, and with a boost from Blaze, they got through the portal. They arrived back in the desert and Sonic thanked them for the help but Blaze said they didn't make any progress. Sonic pointed out they are in the lower part of the gorge now and left.

Later, Sonic ran through a mountainous terrain. He told Tails he felt it wanting to sprout portals again. Tails said there was an abandoned mine nearby that could negate the damage done by the portals. Sonic went in and ran into the Babylon Rouges, with Jet demanding he hand the Topaz to them. Sonic ran off, saying he assumed they intercepted a transmission, so they should know the Warp Topaz is unstable. The rogues are unfazed, but Sonic made work of them and ran ahead. Sonic reached the end of the mine, where Shadow and Rouge were sitting on a large gold nugget. Sonic assumed Tails brought them to a gold mine to entice them to help, and Rouge partially admits to it. Shadow said he can't stand power in the hands of fools. The rouges then arrived on the scene and Sonic gets ready for a 3 on 3 battle, but Shadow had other ideas. He demanded Sonic give him the topaz or he would take it by force. Sonic drilled a hole out of the mine for him and blocks the path with a portal. Tails communicates with Sonic again making sure he is OK and apologizing for cutting out before he could say Rouge and Shadow were there.

Sonic started to feel the Warp Topaz act up again and said he needed to get rid of it, causing him to warp into a cavern. Tails managed to partially tell him he was in the cave where Starline took the gemstone in the first place. Sonic ran around to find the exact spot and found a hole with graffiti left on it by Starline. He thanked the late doctor and placed the topaz into it. The stone started to go haywire, and Sonic quickly got out of the cave before it collapsed on him. On the surface, Tails asked if he was alright. Sonic said they're in the clear and victory #900 "belongs to all of us!"

Sonic and Tails were flying to Seaside City in the Tornado during Halloween. Tails saw the Chaotix bellow and they decided to land near them, hoping they can Trick-or-Treat with them. They landed and Charmy told them about the case the Chaotix were investigating: a monster stealing candy from kids. Sonic suggested ditching Trick-or-Treating to help the Chaotix, and Tails agreed. Sonic asked if they can join and Vector said the more the merrier. They soon reached the spot where the monster struck and they saw another group of kids run away from the monster. Tails pinpointed where the monster was with his Miles Electric via the direction of the screams. As they walked over, Sonic asked Vector what clues they should be looking for. He decided to save time by running ahead of the group. He found a clue and showed it to the gang: a candy bag in a tree. They found a trail of candy nearby and followed it. Soon, Charmy heard some people and quietly looked ahead. They saw a kid tricking another group of kids, but he ran away as soon as Charmy yelled at him. Sonic and Espio chased him, while the others consoled the kids he left behind.

Sonic and Charmy cornered Herschel, but got the monster to defend him. It grabbed Sonic just as Vector came to help. Him and Vector attacked the monster, which turned out to be three kids in a costume. The kid from earlier landed a cheap shot on Vector and ran away, but Sonic and the others managed to nab the kids in the costume. Tails got the kid, Herschel, and brought him back to the group. Rowdy tried to negotiate the stolen candy with them, but Espio refused. Noah said they stole it fair and square, but Vector said they are returning the candy they stole. Charmy managed to find their stash and started bagging it up.

Rowdy cried and explained to Sonic they spent a year making those arms and now their plan was ruined. Sonic said they aren't keeping the candy for themselves because it belongs to everyone. He compared their actions to what Eggman does, and told him helping people feels good. They manage to convince the kids what they did was wrong and the kids apologized. They freed the kids and returned to the city to hand out the candy. Bradyadmitted to Sonic it feels good to help people. They split the remaining candy between everyone there.

Sonic and Blaze ran through the sewers in Spagonia, with Blaze not particularly liking the route he chose. Sonic thought she would have wanted to see more interesting locales after all of the peaceful ones they had been to. Blaze agreed despite having heard of Spagonia's beauty as a city. They reached the sewer exit and jumped outside, leaping and running across the rooftops. Sonic asked Blaze if she was willing to scale the clock tower, promising a good view, and she agreed despite her acrophobia. While standing on the clock's arms, Sonic offered to get them some food from one of the city's restaurants, only to notice her distracted by something, which wasn't the view or the high point they are standing on.

Blaze explained that all the sights Sonic had shown her gave her a love for his world that matched her own world and, as such, she felt a need to show an equal amount of dedication by striving to protect it. However, Sonic reminded Blaze her world has already been saved and she was here on vacation, one that did not involve working. His words reminded her of what Knucklestold her, causing Sonic to jokingly remark that if the concept was obvious to Knuckles, it should be easy to understand. Blaze told Sonic she was envious of his ability to balance recreation with duty, and wished to learn how to do this. After being briefly interrupted by the clock hands moving, Sonic told Blaze that he does not want to be in charge of how she spends her time, instead only wanting her to enjoy herself. Sonic asked if she wanted to get their food on the go as he was already intending to bring Tails and Amy some lunch. Blaze accepted, once again questioning Sonic's definition of a scenic route when he brings it up, and the two descended the tower.

Sonic and Blaze went to the Emeraldville Ruins to deliver some food to Tails and Amy. Blaze pointed out they are probably cold, but Sonic said Tails has a machine that warms up food perfectly. Sonic then sees Silver in the garden around the secret entrance to the Restoration HQ. Blaze notices he is upset and hands what she was holding to Sonic. He watches them talk and rudely interrupts them by sipping his drink loudly. He tells Silver and Blaze they are great together, saying they are in sync and compliment each other as a duo, similar to him and Tails. He then leaves to deliver the pasta he got to Tails and Amy.

Sonic and his friends were relaxing in Green Hill, when a Giant Chopper ambushed them, swallowed them, and took them to an unknown location. They were let free in a TV set and Cubotannounced to them that they were in Orbot and Cubot's "Winter Jam". Orbot revealed that the prize for winning was a purple Chaos Emerald, but only one team can have it. The groups were split into teams, with Sonic and Tails teaming up. The first game was to create a scenery related to the holidays. Sonic cost him and Tails a win due to his carelessness, entangling both into the lights. In a post-game interview, Sonic admitted it was hid fault, but Tails said speed was just his style.

The next game was "Snowball Jam", where teams had to carry an Eggman Doll to the finish line safely, while avoiding snowballs from the other teams trying to destroy it. Sonic took the Eggman Doll, but the doll couldn't handle his high speeds, disintegrating into mere fleeces. In the next interview, Sonic was shocked his speed caused them to lose. The contestants went through several more games before they came to "Sculpt Jam", where the teams had to make ice sculptures. Team Sonic created a simple sculpture of Sonic and Tails' friendship, but the legs were too fragile and collapsed, leaving Sonic distraught at his failures during the reality show. It was soon revealed by Cubot that "Froggy" was actually a Badnik; the real Froggy escaped the Giant Chopper. Omega went into a frenzy and destroyed the arena, while Rouge stole the Chaos Emerald. The commotion caused Eggman to arrive at the scene and Cubot pressed a button that sent Sonic's friends out of arena and back to Green Hill. Artificial snow rained down on Green Hill and the lights that landed from the set made a beautiful scene. Sonic said they should enjoy the moment and the group goes back to relaxing and playing.

Sonic, along with Tails and Amy would join as a team in the Clean Sweepstakes race. The racers take off on their Extreme Gear, Nite reminds the racers that to qualify they must fully finish the race before a certain number of people cross the finish line. Sonic encourages Tails and Amy to show them what they can do but while doing so, Tails is too busy geeking over people's extreme gear to which Sonic questions him if he wants to test his new prototypes or watch, whereby Tails then regains his focus on the race. The Babylon Rogues catch up to Sonic's team and Jet begins to mock the hedgehog, taunting him with their busy recent work and cockily questions the speedster if he thinks he can truly beat the Babylon Rogues. Wave then teases Tails over his extreme gear, but Amy quickly defends him, telling Wave she would choose Tails' gear over hers any day. Storm attempts to threaten Amy, but the attempt quickly fails as Amy strikes fear into the albatross. Jet goads Sonic into making his own taunt, but the hedgehog ignores him and sets his acceleration to the max. As Jet fumes over his rival getting away, Sonic praises Tails over the acceleration of their upgraded Extreme Gear. Both Team Sonic and the Babylon Rouges continue to race through the streets until Jet tries to take a swipe at Sonic's gear. The two groups are interrupted by Lanolin firing a version of the variable wispon, noting that attacking another competitor is a violation to the rules. Meanwhile, Tangle enthusiastically greets her friends. Somewhere further back, Surge clicks a controller, causing team Sonic's boards to go out of control.

Tails carries Sonic as the pair try and save Amy, which leads to the trio hanging on to the back of the upgraded Pink Rose. The chaos is ended by Whisper who blasts the three boards with her Cyan Laser to help them. Tangle asks the trio if they are alright. Lanolin cuts in and coldly calls them a hazard to the race, telling them to get off the track, which leads to Tangle becoming aggrieved with her teammate's callousness towards their friends who could have been hurt, but Duo agrees with Lanolin's "harsh" behavior. Lanolin retorts that a pileup was only averted due to Whisper's good aim as the Diamond cutters drive off. Team Sonic is disqualified from the race. Later in Central City Sonic, Tails, and Amy are sitting in a restaurant and become suspicious over their disqualification, questioning their Extreme Gear. Tails is upset beliving he did something wrong with his prototypes, but Amy says otherwise, as her gear wasn't build by him but got hijacked as well. She also claims that after the race, the staff of Clean Sweep Inc. refused to let them even approach the battleship and the people on it. Realizing something suspicious is going on behind the event, the trio decide to investigate the shuttle, but question how they'll enter it until Eggman walks in saying he has a proposition. He recalls of how after the heroes wrecked Eggperial City he wanted to do some more research but after catching the opening ceremony of the race, he became furious over Clean Sweep Inc. mocking him. Eggman managed to create an extreme gear called the Eggstreme Gear and a proposition is made: Sonic becomes a distraction in the races while Tails and Amy investigate the airship.

On a nearby building, Sonic listens to the announcements made by Nite the Owl. Nite continues by saying how the objective of the race is to survive, he then counts down while Sonic transforms into the Phantom Rider, once the race began Nite calls out how the Babylon Roguesalready have a lead, but then Phantom Rider comes in and mocks them. The Phantom Rider grabs Omochao and addresses the audience, saying how he is the fastest and no one can beat him. Then he catches up to Jet. Jet claims he has never met him before. Storm tells Jet to wait for him and Wave. Soon the Phantom Rider blasts through other racers causing them to fall off until Tangle manages to catch them. Soon after, Jet is neck and neck with Phantom Rider. When Jet catches up to the Phantom Rider, he causes a smoke screen, causing Jet to go blind for a while. The Phantom Rider mentions how he should make his exit before things get out of hand, but the Clean Sweepstakes Security catches up to him. Lanolin orders him to land with Nite commentating on his reign of terror being over. Lanolin uses her Golden Bell to stop him, but that caused the glass of the track to break making riders fall off the track. The Phantom Rider, along with two of the security guards fall. Tangle uses her tail to save the riders with the Phantom Rider also helping rescue the contestants. Soon after he leaves, Surge hits him with her Extreme Gear. Kit tries to tell Surge to stand down, but she continues by introducing herself to him and complimenting his moves during the race. She mentions how he looks like a guy who can appreciate a good thrashing. Surge punches him in the face, causing a portion of Sonic's face to be revealed. The Phantom Rider kicks her away and escapes.

In Misty Spire, the next round of Clean Sweepstakes is underway Sonic, still disguised as the Phantom Rider, prepares to enter the game using the Eggstreme Gear's camouflage feature as Lanolin flies by. Nite is heard attempting to calm the audience and assuring them that the referees will deal with the situation. Another individualwearing nearly the exact same disguise as Sonic but riding the Omnitempus Extreme Gear has appeared in the arena, holding Duo's scarf as he mocks the Diamond Cutters for being unable to stop him. The new Phantom Rider charges at the racers, knocking one off his board with one hand and catching a ball with the other.

Sonic watches from below, only to notice Whisperand Tangle ahead of him. Sonic hides behind one of the area's rock towers, thinking about his next move when Mimic suddenly grabs his helmet from behind, unmasking him and accidentally launching all of the Eggstreme Gear's weapons at the same time, one of which blows up a nearby rock tower. Mimic slips away into the mist before Sonic can see who he is, leaving the hedgehog face-to-face with the other racers. Confused, Tangle asks Sonic why he is doing this, but the rock tower falls over, separating Sonic from the rest of them as they are forced to flee.

Sonic hiding amidst the sky near the battleship aboard the Eggstreme Gear. He tries to equip his mask but to no avail and hopes that Tails and Amy are faring better than him. A bolt of lightning suddenly strikes nearby, alerting the hedgehog to the sudden change in weather, and causing a couple of the cars to crash into each other. Some of the drivers spot Sonic, who uses a hood to conceal his face, with one of them questioning if "Phantom Rider" is responsible for the storm. A bolt of lightning hits a nearby car and causes it to start falling. Sonic is then spotted by Jet amidst the crowd and begins chasing him down, determined to stop whatever Sonic is up to. Sonic throws his hood at Jet, distracting the hawk long enough for Sonic to lose him.

However, before he can plan his next course of action, he and the Eggstreme Gear are grabbed by Nite the Owl and pulled into his van. Sonic prepares for a fight, only to recognize Nite's voice as that of the event announcer. Nite is amused by Sonic's reaction and introduces himself and his vehicle to the hedgehog. Sonic also meets Nite's partner, Don, who comments the events in Misty Spire. Sonic states that that was not him, which Don had already suspected to be the case. Don sees Jet ahead of them and pushes Sonic out of sight until the hawk leaves, after which Nite offers Sonic cocoa. After listening to Sonic's explanation of what happened, Nite asks if he is worried about them possibly revealing his identity, but Sonic answers that it is a bit late for that. He explains that although he would have preferred to keep it a secret, he will still do what he needs to do regardless of what the world thinks since his friends are counting on him. Sonic asks Nite what he and Don are up to. Nite explains that the Chaotix Detective Agency have been investigating Clean Sweep Inc. for a while and were going to search around the shuttle, but he and Don have not heard from them since, which is why they approached Sonic. Sonic tells them that Tails and Amy are on the shuttle and might know something about Team Chaotix if they can find them. Don returns from repairing the Phantom Rider's control panel, and Sonic is able to transform into his full disguise again, setting off to get to the bottom of the situation.

Sonic is waiting for the race to start and says that this is his last chance and that whatever Tails and Amy are up to it better be wrapped up and soon after the race begins with Nite announcing it is set right in the streets of Central City.

Suddenly the Phantom Rider appears, and Jet immediately goes after him while Wave crashes trying to remind him to be gentle when Surge and Kit blast through the crowed when Surge tries to run into him, but he does it when suddenly Surge jumps from her Hang-On and knocks him off the Eggstreme Gear after trying to taunt her while Kit grapes her using his Hydro Pack tails. Soon the Diamond Cutters surround him with lanolin telling him that he is done and it's enough and Lanolin counties saying that he would not like her kick on her wispon. Sonic disagrees when suddenly the Babylon Rogues surround him when Nite announces a halt in the race, saying that everyone is going after the Phantom Rider with him dogging attacks from Lanolin, Surge and Kit who Surge manages to grab on to his Eggstreme Gear while Whisper uses her Variable Wispon to fire. Jet than orders the rouges to attack but are stopped by Kit's tails when Tangle uses her to grab Surge until she zaps her and tells her to not get in her way while the Phantom Rider continues to taunt her saying their fights aren't it. The Phantom Rider launches at her while Surges also blast towards him and Surges gets knocked by the collision when after she laughs at him saying she got the device turning the Phantom Rider back to Sonic while Kit ask Surge is she's okay and she replies saying she's fine and did not ask any stupid questions. Sonic then ask her what the game and Surge replies is saying that she is following order and ask her boss if he is happy. Later on, Sonic and the others watch as the shuttle is falling and soon Sonic heads towards the shuttle but once he realizes Lanolin is chasing him he stops her saying they can do whatever they want with him later but they he's going to help the people on board.

Soon Sonic reaches the ship and just before Clutch was about to escape Sonic knocks him away, reprimanding the opossum for his behavior and business practices. He evades the bullets fired from Clutch's gun cane, only to be interrupted by a hostile Surge and Kit. Sonic takes this opportunity to free the captives including Charmy, Jewel and Nite as the former two catch him up on the situation. Sonic then sends Charmy and Jewel to get civilians off of the ship before it crashes while he deals with Clutch. The opossum opens fire on Surge and Kit with a cannon, only for them to be pulled out by Sonic atop his Eggstreme Gear. They start fighting with Sonic not wanting to share Clutch and the three open themselves up to a direct hit by Clutch's cannon. He attempts to escape on the Eggstreme Gear, only for it to transform into a robot. It's revealed Eggman's in control of the Eggstreme Gear now with his face on a monitor. He throws around Clutch and plans on taking the opossum himself before Sonic jumps back in to make sure Eggman doesn't get his mitts on Clutch. Sonic demands that Clutch apologize for his actions, the three boys ignoring Surge, who had been charging up a massive electrical charge which she expends on blasting the trio with her Over Charge. They're all knocked out for a few seconds, the attack draining Surge of most of her energy. However, Eggman reveals he built a surge protector for his Eggstreme Gear and picks up Clutch. He tells Sonic it's nothing for the hedgehog to worry about it's just business. He flies off with Clutch in tow, both Surge and Kit taking their leave on their Extreme Gear as well. Surge assures Sonic that they aren't friends, and that they will fight again one day.

Sonic faceplants into the ship's glass and orders the crew to get onto the deck. Amy breaks the glass with her Piko Piko Hammer and hugs Sonic, the Babylon Rogues boasting to Sonic that they saved the day. The rogues order the drivers to pull the ship. It's still on its way to Central City though with the news unable to contact the ship. Jewel comes to the conclusion that they will have to direct the ship to Emeraldville Ruins, aka Restoration HQ. Jet begrudgingly orders the cars to pull the ship towards Restoration HQ. Amy asks Jewel if the HQ is empty. It isn't, but it's a smaller loss than what would happen if it hit the city. Before the shuttle crashes into Restoration HQ, Sonic challenges Jet to a competition. Whoever can get the most civilians out of Restoration HQ before the ship crashes wins. Jet accepts, the other members on the ship follow Sonic's lead to save as many lives as possible.

Sonic busts soon through the roof of Restoration HQ and lands in a tree, warning the members inside to get out. He and Jet speed off to save more people than the other. Sonic and Jet constantly boast about how many citizens they've saved with a combined total of 92 civilians saved. The ship crash lands into the HQ, completely demolishing it in the process. Sonic heads back in to see if anyone was left behind despite Amy's pleas. Jet leaves as Sonic heads in, hearing a cry from Tails. Belle and The Chief Mechanic are trapped under rubble and the smoke is making it difficult to breathe. They make a plan to break free, Belle kicking the beam holding them down as Tails follows Sonic's lead. As they're about to escape, a large piece of rubble smacks Sonic back down. Belle, atop a rebuilt and flying Motobud, saves both Sonic and The Chief Mechanic.

Amy calls for Sonic on the outside before the group from inside breaks free with Amy running to hug the hedgehog. Jet and Sonic promise one another a rematch in the future while Tangle rushes into check on a teary-eyed Jewel, who's being comforted by Amy. Jewel believes she failed the Restoration with the HQ destroyed, only for Tangle point out that the Restoration was more than a building. It's the people who are a part of it. Everyone goes down to help clean up the mess even Rough and Tumble.

Later on, that day Sonic and Tails head to Tails' lab, tired after a long day of work. The two-grow concerned when they find the door barely open. Sonic wonders if someone broke in, and it turns out he's right. The yellow Chaos Emerald is missing from the lab's generator core. The Chaos Emerald is seen hovering over a small stand in a dark and almost alien-like room, serving as the only light source in it.

Many days after the destruction of Restoration HQ, Sonic arrives at the Chaotix Detective Agency. As he enters the place, the Chaotix immediately stop what they're doing and make Sonic sit down, close the window's curtain and put the table lamp on his face, Vector then starts interrogating him for his actions as the Phantom Rider. But Sonic, not worried about it at all, only responds it was his only option at the time, and smugs how people "say" the Rider is "pretty good looking". Espio then asks if it's true that he became the "Phantom Rider" while in "cahoots" with Eggman, but Sonic only claims it was only a convenient circumstance after commenting on Espio's choice of using the word "cahoots". Sonic explains that Eggman wanted to know who was running Clean Sweep Inc., and that Sonic, Tails and Amy thought something was suspicious in the Clean Sweepstakes race after their Extreme Gears got hijacked. So Sonic agreed to use Eggman's Eggstreme Gear to distract the Clean Sweepstakes Security as the Phantom Rider while Tails and Amy sneaked into into the Restoration shuttle to investigate. Charmy loudly claims he should've have come to them first, but the hedgehog responds they already were on the case, adding how Tails and Amy saved them and claiming everything worked out fine. Only for Vector and Espio to remind him that not only Sonic interrupted the race, but Restoration HQ was destroyed and Clean Sweep Inc.'s CEO, Clutch, is still at large. Sonic, turning on the lights, claims his point is that one got injured, but admits he is worried about Clutch still at loose, and claims this is the reason he came to the Chaotix in the first place, to find Clutch. While Vector is surprised that Sonic wants in on the investigation, Espio asks if this is another deal with Eggman, reminding he is a notorious manipulator, only for Sonic to remind him how the Chaotix took a case from him once, although the former still stands his point. Sonic says he knows it's not very surprising that Eggman double-crossed him, but he wants to know what the former did with Clutch and if the two will cause harm to others in the future, so he wants the Chaotix's help, which Charmy excitedly agrees. Upon learning Sonic was there when the shuttle went down, Vector decides to adds his testimony to the board, where there is all the information they know so far about Clutch and the Clean Sweepstakes.

A while later that day, Vector has updated the board with the new info given by Sonic. Having gathered everything, Sonic learns that Clean Sweep Inc. seems to be still operating, but with no knowledge of who is running it. Espio claims it can't be Clutch, because of his revelation during Clean Sweepstakes; and Vector claims it can't be Eggman either, as he hated the operation. Sonic decides to start investigating and wakes up a sleeping Charmy. Sonic also hopes this will help them discover who took the yellow Chaos Emerald, with Vector responding to take one case at a time. With this, Sonic and the Chaotix, driving the Beat Monster, head to White Park Chateau.

Sonic and the Chaotix who are following Sonic in the Beat Monster arrive at the White Park Chateau in White Park Zone. Vector doubts Clutch would actually return to his stomping grounds after what happened to Restoration HQ, while Charmy wants to go to the amusement park, but is said no by his lead detective. As they park close the chateau, Sonic realizes the avalanche that attacked it the last time he was there was cleared away and place seems repaired, but the place also seems abandoned. Charmy then spots someone's silhouette on the window. So the boys immediately bust in to the place. Inside, the chateau is empty, only with may deactivated Egg Pawns lying around, Sonic uses his speed to look over the place and finds that many rooms are locked while others are empty, he only didn't check the kitchen, wanting to get some food. But then the boys hear a voice behind them and find Rough and Tumble wearing fancy clothing. As Rough rings a bell, the Egg Pawns suddenly activate and attack Sonic & the Chaotix, who fight back. Espio manages to take down some bots with his kunai, while Vector holds one still and then finds Charmy playing with a board game called "Half-Pipes and Pulleys", which he seems to be fond of. Seeing the Egg Pawns aren't enough to take down the heroes, the skunk brothers decide to "come out of retirement" and attack as well. Rough attacks Espio while Tumble attempts to attack Vector, the two Chaotix tear up the skunks' clothing, much to their exasperation.

Sonic puts an end to the fight and Vector asks the skunks why they are doing it if they quit Clutch. The brothers respond they are now legitimate businessmen, and that instead of working for Clutch, the latter is now working for them. While Charmy congratulates them, the others don't believe the duo. But then Clutch, completely well and unharmed, calls their attention. He shows to actually be serving the skunk brothers, as he calls them "misters" and asks for their permission to talk to the boys. Rough and Tumble allow him to and order him to clean up after. The Chaotix and Sonic believe it might be a trap but decide to go on anyway, while Vector orders Charmy to put the board game back, which the latter refuses. They follow Clutch to his penthouse suit as he sits down asks what they want after already ruining his life. Sonic asks him to answer for the destruction of Restoration HQ, which the elder replies that it was a pyrrhic victory and that the Restoration didn't lose anything valuable, while he himself lost everything. Sonic then asks what happened to him after Eggman took him away from their fight during the Clean Sweepstakes; Clutch responds that he escaped from Eggman as soon as he got distracted, but the heroes (except Charmy) still don't believe him.

Clutch then admits he overplayed his hands during the Clean Sweepstakes, so he did the "reasonable" and "smart" thing to do and ran away and hid. Vector calls out that hiding in the first place they would look for doesn't seem "smart", which Clutch replies the chateau was his haven and that the heroes didn't find him directly. The crocodile then asks why he still has Egg Pawns and Rough and Tumble with him. Annoyed, Clutch handles the heroes the deed to White Park Chateau, showing he signed the place over to the skunk brothers, as well as terms of his employment during their ownership, after the brothers went to him wanting a payback. He also claims the egg-tech are leftovers stock from when he ran operations in the place. Espio then demands to know why Clean Sweep Inc. is still operating. The opossum responds it's operating thanks to his automated robots, also claiming that most of his living being employees abandoned him after he was exposed. Sonic asks if there are maintenance bots, while Vector still has doubts, while calls the opossum rotten. Clutch claims the heroes have won as they beat him when he tried to get back into the game and that it is all over. Charmy feels remorse for Clutch, while Espio tells him not to. With this, Clutch gives Sonic a paper with the address of the nearest operational Clean Sweep facility for they to go look themselves, even claimed they can burn the place to the ground for all he cares. Charmy begs to take the board game with him, which Clutch angered agrees to. The heroes then leave the place, but Vector claims they will return if things still remain not right.

The heroes return to the main floor where they find Rough and Tumble sitting by the fireplace. Espio then asks what exactly the brothers do in the place, which them respond they do what they want and eat what they want, and that Clutch supplies them with everything they want. But when Espio remarks he meant what business they run, the two get embarrassed and confused, turns out they're not working at all, just living by Clutch's luxury. The heroes leave the chateau and return to the Beat Monster. Sonic is a little confused about everything and Vector is still not convinced by Clutch's story but decides they should indeed check the facility the former pointed out to them. The Chaotix take off in their car while Sonic goes on foot, while Clutch watches them through the window.

Sonic who is sitting on top of the Master Emeraldon Angel Island says how he'd thought Knuckleswould never say that when Knuckles responds saying he wasn't talking to him when Sonic starts to tease him. Knuckles yells at him to come down from the emerald when Sonic says he was totally just thinking about him and Knuckles says how he was never thinking, and Sonic says how Knuckles has no idea what he's saying when Tails and Amytells them to stop arguing.

Knuckles then ask the group what they're doing here and did something happen. Amy responds saying does something have to happen to come visit their good friend and Tails jumps in and says that they just wanted to check in on him and make sure he wasn't getting lonely. Tails further explains that it was Sonic's idea when Sonic says how it was a good idea and saying how he missed their "beautiful friendship" when Tails apologizes for being late saying how they got sidetracked. Knuckles then says how an unexpected adventure happens and knows them to well and asks what happened when Sonic starts by saying it started this morning.

Sonic and Tails go to the Spring Flower Festival to have fun and rude rides, while there they run into Amy who tells sonic about the Annual Flower Frolic Competition being held, later on they would meet up with Silver, Espio and Jewel who are competing. Once Amy and Nite introduce the participants Silver's plant catches on fire causing him to be eliminated, after Sonic tries to cheer him up and say that there is always next year, which Vector helps Sonic and Tails find out who tampered with Silver's flower. But after discovering that Silver was the cause of his failure the case would be solved until they found out that someone but herbicide in his plant. Then they run into Big who mentions the suspect running throughout the festival later they would find out that it's Charmy, but he was confused due to the label being purposely swapped by Rough. Shortly after the winner was announced Sonic and Tails enjoyed the rest of their time riding rides

At some point, Sonic and his friends were battling Eggman forces near a large mountain in Green Hill. Sonic himself was fighting Dr. Eggman's Eggcrusher. Tails flew over the scene in the Tornado and warned Sonic of some sort of trap. Sonic didn't understand nor pay much attention to the warning and soon destroyed the doctor's mech. Instead of attacking the doctor, Sonic's strike made a machine inside the mech send out a huge shockwave throughout Green Hill. Upon examining the ruins, Sonic discovered that Eggman was not in there, but shrugged it off, believing that he had escaped. Sonic tried to communicate with Tails, but he realized that something was wrong.

Sonic later went to Tails' workshop, bringing comics and urging him to stop the "big brain stuff" for a moment. Tails had been thinking about the empty Eggcrusher, finding it strange that Eggman had not been piloting it. Sonic then went back to the battle area and returned with the machine that the doctor had placed in the mech. Noticing that Sonic had never made a shockwave as powerful as the one he made while destroying the mech, Tails suspected the device was a Speed Amplifier that used Sonic's speed against him. Immediately after, the duo was greeted by Rouge, who had snuck into Tails' workshop. She confirmed his theory. With her new information, Sonic and Tails learned of a mysterious gem called the "Paradox Prism", which, according to legend, could give access to unlimited power. She also informed Sonic and Tails that it is buried deep within Green Hill's bedrock. Rouge hypothesized that Eggman was attempting to find this gem too, hence his deploying of the Eggcrusher, and ordered Sonic to gather his friends to figure out what the doctor was up to.

Sonic met up with his friends and they decided to investigate what was going on, as he went to run over to the Paradox Prism's area. While running, he hoped to wrap up the investigation before dinner, thinking about eating chili dogs in the aftermath. However, he ran into Shadow, who questioned what the blue hedgehog had done in response to the speed amplifier incident. Sonic simply responded back by saying that Eggman was the bad guy, starting a battle between the two. After losing some of his Rings, Sonic told his rival that he was on a mission but refused to tell him about it. Afterwards, he distracted the black hedgehog and attacked him to run to where his friends were, meeting Big and Froggy and collecting some more Rings along the way.

Eventually, Sonic arrived at the scene of the Paradox Prism, only for his friends to greet him by saying that he was late. When they found Eggman about to take the Paradox Prism, he revealed his plans to take the gem and use it to take over the world. After a battle against the doctor's Badnikswith his friends, the hedgehog saw the villain taking the Prism, so he ran towards him to prevent this, lunging with a Spin Dash. However, the Paradox Prism was shattered, causing Sonic to be separated from his friends. He soon found himself lost in the Shatterverse and later ended up in New Yoke City.

After Sonic explored this new location, he noticed his shoes' soles were glowing and emitting electricity off of them. He then asked the locals where he exactly was but was irritated to see they were ignoring him. Confused as to why everything is so soulless and lifeless, he noticed different versions of Big and Froggy in sight, whom he mistook for their counterparts from his universeand questioned the clothing they were wearing. However, when the hedgehog attempted to talk to them, a Security Drone went on alert after seeing him due to him being "an unidentified citizen". Finding himself cornered by Eggforcers, who ordered him to stand down or else be eliminated under the order of the "Chaos Council", Sonic ran off, but struggled to maintain balance due to his shoes. As he fought these robots, he noticed certain parts of Green Hill were here, albeit heavily distorted. Remembering the previous events, and how Eggman planned to get the Paradox Prism, Sonic believed that his nemesis might have won. As such, he rushed off to find Tails.

Sonic then runs into a robot controlled by Dr. Babble. After fighting the robot, Sonic notices Babble in the cockpit and is confused why a baby was in there. He decides to ignore Babble and carry on for finding Tails. Upon entering a subway station, he spots who he perceives to be Tails. Excited, he runs into an alleyway. He then notices the door "Tails" entered in. However, it has a password. Sonic hopes that the password is the same as the one at home, and it turns out it is (1-9-9-2). He then enters the room, and notices Tails' base is significantly different from the one at home. But he brushes it off and runs to Tails in order to surprise him. However, it is revealed to be Tails Nine. As Nine started to fight against Sonic, he tried reasoning the fox inventor, to no effects being done. He and Nine would keep fighting against each other as they would exit his lab, then on moving trains. As Sonic dodged his pouncing, he saved Nine from almost being violently hit by a moving train.

Sonic explains to Nine that they are friends, but the young fox would still not believe him, which lead to Sonic interrupting him, pleading him to stop and listen. Sonic would then talk about how he and "him" have met a longtime ago; him saving Tails from intimidation by the fox bullies. Nine would then talk about his past via his point of view, where Sonic never showed up, Nine taking a beating, and how he created 7 extra mechanical tails as an act of revenge. After he finished talking about it, Sonic is confused about him being Tails, but at the same time not, and him being there when at the same time he isn't. He would then talk about the numerous adventures he and "him" had in the past, as well as talking about him having the Tornado and them beating Dr. Eggman plenty of times. Nine would then point out his soles (and eventually his shoes) were smoldering, much to Sonic's chagrin.

Sonic was then scanned by Nine to see the problem, in which the former was taken by him to his lab so that the young fox inventor could fix the problem. Once Sonic arrived, Nine presented a set of Regulators to him in order for the strange energy to be attuned. Once equipped, however, his gloves and shoes started to glow, transforming into special pairs of gloves and shoes instead. Sonic was quite amazed to see the new pairs he has gotten from the Regulators, in which he thanks Nine. Once they got out, Nine told him to be quiet to not be noticed by anything, in which the latter ignores, eventually being grabbed by Dr. Babble. While Dr. Babble carried them back to the Council, Nine and Sonic then have a small banter about keeping quiet.

Sonic wakes up in pain from a bright light flashing onto him. He then notices Nine and Rusty Roseappearing before him. He assumes Rusty Rose is Amy and asks for a key, then shortly notices that she's a robot. The Council then make their presence to Sonic. Sonic gets irritated by the council, and Rusty Rose then suggests stress tests to identify Sonic's energy signature, Sonic gets further irritated by this. Rusty Rose threatens Sonic to go through the tests or else harm will come to Nine, Sonic complies with the terms and undergoes the tests. Rusty Rose finds the results inconclusive, Dr. Done-It tells Rusty Rose to force him to run. Sonic, (still under the assumption that Rusty Rose is Amy) is confused by Rusty Rose's lack of compassion, Rusty in response shows the Flicky within her. The Eggforcers then harm Nine, enraging Sonic. He tells the Council his frustration comes from the latter "messing with his friends". Sonic thus runs faster and starts to see Shadow, Sonic assumes that he is hallucinating and passes out.

After remembering Shadow, Sonic wakes up. Tired, Sonic asks if he passed the tests. The Council prepares to kill Sonic and extract his “weird energy”. In response, Sonic asks if he could say his final words. Sonic then attempts to come up with a speech about his friends and his life. During the speech, he looks at Nine and assumes that he's winking, leading him to believe that the fox has a plan. Afterwards, Nine mentions that there was just dust in his eye, and he wasn't actually winking. Nervous about his potential death, Sonic mutters that it’s “Game Over” for him. Fortunately, Rebel Rouge and Renegade Knucks save Sonic from the execution, then fight the Eggforcers and Rusty Rose. Sonic's cage spins around, causing him to be woozy. Nine deactivates Sonic's cage and notice the two rebels in front of him, Sonic assumes them as Rouge and Knuckles. Sonic then struggles to fight Eggforcers and Rusty Rose due to his dizziness. Before Rusty Rose can harm Sonic further, Nine manages to gain control of her, and uses her to destroy the other Eggforcers, temporarily turning her to the good side.

With the battle over, Sonic attempts to do a group hug with Nine, Rusty Rose, Renegade Knucks, and Rebel Rouge, but they resent it. Sonic remembers the mess he's in and introduces himself to them and tries to explain to them who they were in his universe. The team then run to escape, Nine then discusses the Paradox Prism with Sonic, and where to find it. Sonic then runs into Dr. Deep and fights him. After finishing the battle, he high fives Nine. The Eggforcers then attack the team. As a result, Sonic shows his team how to perform the Spin Dash. He throws Nine and Knucks at Eggforcers, causing them to curl up into rapidly-spinning balls and destroy the Eggforcers. Noticing his shoes are picking up on the Prism's energy, Sonic runs towards the Energy Crystal.

Sonic encounters Dr. Babble and is annoyed with the repeated encounter. He runs around the Yoke and fights Dr. Babble. After the fight, Renegade Knucks and Rebel Rouge get trapped on the other side of the door, forced to fight Mr. Dr. Eggman in his mech. Sonic tries to save them but Nine suggests to get to the Paradox Prism. Sonic then finds what they were looking for, but realizes it's not the full Paradox Prism, but rather just a red Shard. This causes him to realize his ignorance towards his friends warning him about attacking the Paradox Prism, and for him to remember that he shattered it. With a newfound determination to fix the Paradox Prism, Sonic grabs the Shard, but ends up being sucked into it.

He finds himself in a new world: the Boscage Maze. Sonic is confused as to where he is. He gets excited when he sees new versions of his friends. He mistakes Prim Rouge and Gnarly Knuckles for Rebel and Knucks, causing him to realize he is in a different world. Prim takes charge of the situation and explains to Sonic their current lack of food problem. Sonic agrees to help them, believing they know the location of another Shard. Prim asks Sonic to take care of the "monster" that lives in the jungle. Sonic and crew search for the monster, but the Scavengers are easily defeated by it. Sonic meets and defeats a giant Birdie. But the monster is soon revealed to be none other than a new version of Amy: Thorn Rose. Sonic has a hard time fighting with her. In the end, Sonic and Thorn make a deal. She takes him to the "Great Green": a giant palm tree. Sonic senses the Prism Energy thanks to his shoes, and recovers the Shard, holding it with a leaf in case he were to get sucked into it again. Thorn, however, smacks Sonic with her hammer and steals it from him, powering her hammer. The two hedgehogs have a long fight in the jungle, with Thorn using the Shard's power to attack. Later, Sonic tries to make Prim and Thorn have a conversation, but things don't go as planned. In the end, Sonic is able to make Thorn realize she is the one harming the jungle. She thanks Sonic for his help. Sonic goes after the Shard and trips, which causes him to disappear once he touches it.

Sonic ends up going back to New Yoke City. He encounters Knucks again, who is a little angry at him. They defeat some Eggforcers, and go back to the Resistance's hidden spot. Rebel is surprised to see Sonic again and shows her anger towards the hedgehog. Sonic realizes time flows different when he travels through dimensions and discovers that weeks passed since he was last there. However, he still joins the Resistance and assists them in the fight. They go to the streets to fight the Council. When things get complicated, Nine comes back in a flying vehicle. Sonic is happy to see his fox friend again. Nine however, takes Sonic to a new world (or as Nine dubbed them: Shatterspaces): The Grim. Nine asks Sonic to stay with him and build a new world, but Sonic opposes, as he still has a fight to win back in New Yoke, much to Nine’s disappointment. He goes back to the city to keep helping Rebel and Knucks. Nine changes his mind and comes back to help too, which makes Sonic happy. When the fox is captured by the Council, Sonic attempts to find him. He goes so fast that creates a portal to another dimension.

In a new area, Sonic is seen falling from the sky into the water. He soon meets pirate versions of his friends: Black Rose, Batten Rouge and Sails Tails. They attack Sonic at first, but then change their mind and let him row the boat for them. Sonic is surprised to see Knuckles as the captain and has a flashback to their first encounter. Knuckles the Dread welcomes Sonic and lets him stay on the ship. Sonic is surprised to discover that the pirates have parties all day and never fight. Black Rose tells him the story of the Devil's Lighthouse. Sonic is determined to go there to get the Shard. When they are attacked by Dread's old crew, Sonic encourages his friends to fight, and almost all of them are able to overcome their fears. Dread, however, acts as a coward. The crew is then surprised to see Rusty Rose and an army of robots. Sonic leads them in battle, but the robots still do some heavy damage to the ship. Rusty Rose leaves, and Sonic tells the crew how to fix the ship. Dread leaves the ship, but Sonic convinces him to come back. They all go after Rusty Rose, and engage in a fierce race across the sea. Sonic is shown to be very effective in battle. When Dread is able to grab the Shard, he gets struck by lightning. Sonic runs to his aid, but accidentally touches the Shard, which teleports him back to the Void.

Shadow confronts Sonic, attacking him for destroying their original world. Eventually, he explains to Sonic his situation, and shows him the Void and the entrance to all the other Shatterspaces, the Gateways. Sonic and Shadow go to the portal leading to Ghost Hill. Sonic is at first happy to be back home, until he realizes it's not the same place it used to be. He also sees ghost versions of Tails, Amy, Knuckles and Rouge, stuck in a limbo repeating the same phrases over and over again. Shadow takes him to the top of the Temple Mountain, where the yellow Shard is still in its place within the Ghost Prism. The hedgehogs come up with a plan to bring all the Shards to the Ghost Prism, hoping to fix the Paradox Prism and save their world and their friends. Shadow assumes Sonic's tech is what makes him able to enter Shatterspaces, so he tries to steal it. The hedgehogs engage in a fight across Ghost Hill. Shadow is able to steal the tech and goes back to the Void. Sonic, upon remembering that the Prism energy isn’t in the shoes but rather Sonic himself, uses his speed to leave Ghost Hill and follow Shadow. When Shadow tries to enter The Boscage Maze Gateway due to seeing the Chaos Council's Mothership, he is unable to and becomes incapacitated from the explosion. Sonic travels at full speed to save his rival. Sonic and Shadow decide to set their differences aside and team up once Shadow realises that the only way to enter them is to have Prism Energy, which only Sonic has. Sonic goes into the Boscage Maze Gateway to follow the Council.

Sonic is happy to see the Scavengers again. Thorn Rose orders them to go back to the jungle and fight the Council. Sonic agrees with her, but the rest don't. When Thorn goes back to battle, Sonic tries to convince Prim to help them, but she refuses. The blue hedgehog goes to the jungle to help Thorn Rose. They fight against the Council's robots. Nine speaks to Sonic through one of the Eggforcers, giving Sonic a way of communicating with him and modifying his tech so he can grab the Shards without vanishing from now on. Sonic and Thorn continue to fight against Dr. Don't and Dr. Babble. The rest of the Scavengers also come down to help. In the end however, Sonic is unable to stop the Doctors, and they steal the Shard.

Back in No Place, Sonic meets with the Angel Voyage's crew again. He is surprised to see they made Rusty Rose a part of the team. As always, Sonic is quick to help his friends. Dread tricks Sonic, and turns his crew against him, telling them Sonic abandoned the fight. Sonic comes back to the ship with the Shard he stole from Dr. Deep and Dr. Don't, only to be met with his crew, now furious towards him. Sonic gets frustrated with the situation. He runs away while Dread and his crew try to capture him. Despite the conflict, Sonic still helps them in fight when the Eggforcers attack the ship. Dread gets his hands on the Shard and abandons the ship. Sonic follows him, running on the water. The Council's Mothership arrives at No Place, and captures Black Rose, Batten Rouge, Sails Tails and Catfish. Mr. Dr. Eggman threatens to hurt Nine and asks Sonic to give the Shard back. The hedgehog throws the Shard away, taking control of the situation. However, Dr. Deep grabs it and goes back to the Council's ship. Sonic and Dread follow them through a portal by grabbing onto the Mothership.

In New Yoke, Sonic helps Dread when he is falling from the ship. He later encounters Rebel and Knucks, but they are not too excited to see him. Sonic helps them fight some robots, and Rebel insists that they need to go to the Yoke's main base. Sonic, Rebel, Knucks and Denizen 1998 go on a mission through the subway area. They are surprised to see the Eggforcers are getting stronger. By the Regulator's communication function, Nine tells Sonic to meet him at the base. Tricked by Mr. Dr. Eggman, Sonic and friends meet Chaos Sonic instead. The robot is quick to make fun of Sonic and attack him. Sonic engages in a race and a fight with his metal copy. After he lures Chaos Sonic onto an active road, a train crashes into the robot, allowing Sonic to get back to the base with Knucks and Rebel. They infiltrate it but are surprised to see Chaos Sonic is back. Dread joins the fight and helps them. However, Chaos Sonic doesn't go down that easily. Sonic follows Nine's plan and takes Chaos Sonic to the room where his fox friend is. Nine shoots a laser that destroys the robot, much to the dismay of the Chaos Council. Sonic and Nine are finally reunited and decide to take the three Shards and take them back to Ghost Hill. The Council follows them through the city, No Place and the Boscage Maze. Sonic asks his friends for help in the different Shatterspaces. Thorn helps him in Boscage Maze, while Batten and Catfish help him in No Place. Once Sonic and Nine are able to get to the Void, they meet up with Shadow.

Sonic, Nine and Shadow go to Ghost Hill. Nine asks the hedgehogs to leave him alone while he tries to put the Paradox Prism back together. Sonic agrees, while Shadow has a hard time trusting the genius fox. The Council finds its way to the distorted Green Hill. Sonic and Shadow team up and fight the Eggforcers. Dr. Deep and Dr. Babble join the battle using their mechs, giving the hedgehogs a challenge. The hedgehogs fight Babble and Deep until Mr Dr. Eggman powers the Eggforcers. Nine, out of Sonic’s request, transfers a boost of the Shard's Energy, greatly enhancing his speed and allowing him to generate temporary holographic copies of himself. With this, Sonic and Shadow defeat the Eggforcers, Babble and Deep with ease. While Nine was putting the Shards together (specifically by placing the New Yoke City Shard where the Boscage Maze Shard goes), Green Hill came back to life for a brief moment, along with his friends. Sonic was excited to see his friends back and tries to run towards them, but the effect was short, much to the hedgehog’s despair. Mr Dr. Eggman uses most of what's left of their Shard Energy reserves to create a Prismatic Titan in the image of the original Dr. Eggman. The giant shows neither Sonic nor Shadow is no match for it. Sonic asks Nine to transfer more of the Shards' Energy to himself in an effort to stop the Titan. After listing some risks, such as Sonic possibly exploding if too much Prism energy is transferred, Nine agrees. Sonic painfully absorbs the Prism Energy and gains a minor physical transformation, getting purple eyes and some other shiny effects like flaming quills. Shatter Sonic is shown to be extremely fast and powerful, as he defeats the Titan by entering its mouth and running around at insane speeds inside it. Sonic then goes back to the cave, only to find that one Shard is still missing, the one from The Grim. Nine reveals to the hedgehog that he only wanted to study the Shards and see where each of them fits. Sonic insists on fixing Green Hill, but Nine gets angry at him for not seeing things the way he does. Angry after their discussion, Nine steals the Shards and escapes, leaving an almost-sorrowful Sonic and an enraged Shadow alone in the cave.

Sonic is still shocked by Nine's betrayal. When Ghost Hill starts to collapse, Shadow tells him to start moving. The hedgehogs run through Ghost Hill, trying to find a way out. Sonic stops running when he sees his friends again. He feels hopeless and can't do anything to help them. Sonic and Shadow are able to escape Ghost Hill and go to the Void moments before the Gateway and Ghost Hill itself exploded. Sonic quickly remembers The Grim and how Nine wanted to build a home there. The hedgehogs reach their destination by using a tear in the side of the Gateway, and, despite Sonic trying to reason with his old buddy, Nine has nothing to talk about. Sonic is surprised to see Alpha Grim Sonic. Sonic and Shadow team up again to defeat the robot, but Nine surprises them with more robots in the image of Rouge, Amy, Knuckles and Birdie. When Shadow realizes Nine is after Sonic's Prism Energy, he takes Sonic out of The Grim, sending him back to the Void.

Sonic finds himself in the Void, ready to go back to The Grim. However, he has to adapt and change plans as Nine ordered Grim Birdies to follow Sonic. The hedgehog is able to lose them and go into New Yoke City. Nine uses the Prism's Energy to observe and speak to Sonic. He rotates the city, causing the citizens to fall over. Sonic catches as much as he can. When he is about to save Denizen 1998 and New Yoke City Froggy, he falls. But to his luck, Prim rescues them. Sonic quickly realizes that most of his friends from other Shatterspaces are there to help. He then meets with Rebel and Knucks, as they save some more people. Sonic runs through the city while the Grim Birdies catch up to him. He is able to damage the Alpha Grim Birdie in one of it's eyes. Sonic is surprised when the Chaos Council helps him fight the robots. Doctor Deep states that they only do it to protect their city. Sonic makes an alliance with them, promising to help each other. Inside the Yoke, the Chaos Council argues with the rest of Sonic's friends. Rebel and Knucks are hesitant about trusting the Council while the Chaos Council as well with letting them take refuse in their dome, but Sonic is able to convince them they don't have any other choice. Sonic goes into the hamster ball to help create a shield to the Yoke. This proves effective when Nine attacks do nothing against it.

Sonic then realizes some pirates are missing, and seeing Black Rose have no idea as to where they are, he suggests to go back to No Place to look for them. Rebel opposes this idea, but Sonic convinces her by saying he would risk his life to save any of them. Black Rose quickly sides with him. Sonic and the Roses get onboard the Krakenand travel to No Place. Rusty Rose scans the area and finds the Angel's Voyage. Nine's Grim Birdies follow the ship and cause some trouble. Sonic is able to get Sails, Batten and Catfish on the ship. They race back to New Yoke as the robots follow and shoot at them. They are able to escape and return to the Yoke, resulting in Sonic splashing on Dr. Deep and Dr. Done it and Mr Dr Eggman in a mental beat. Not wanting to put his friends at risk, Sonic offers a deal to Nine. He says he will let the fox drain all his Prism Energy in exchange of letting his friends and their worlds free and fully restored. Nine agrees and creates a portal so Sonic can go to The Grim.

Sonic arrives at The Grim alone, ready to honor his deal. He tries to reason with Nine one more time, but Nine shows no signs of stepping back. However, something in him changes once Sonic says he still considers him a friend. Suddenly, Sonic notices his shoes are starting to glow. They create a portal, and all of his friends come to The Grim to help him. Nine feels betrayed and rejects the deal. Sonic tries to make a new one but fails. After Nine clones the Grim Alpha robots, the battle is on. Sonic and all his friends start fighting, but the robots prove to be great adversaries.

Sonic realizes things aren't working, so he asks Rebel to come up with a plan. She explains it to everyone, and Sonic leads the rebels against Nine. Things get even more complicated when Nine creates Grim Big, a giant war mech with missiles, one of which hits Sonic, knocking him unconscious. Some time later, Sonic falls through a crack on the floor. Grim Sonic robots keep attacking him, but Sonic is exhausted from fighting. Shadow comes to his rescue, destroying the robot. The hedgehogs come out of the hole and join the fight again. Sonic comes up with a new plan, and tells his friends to pretend to lose the fight. This proves effective, and Nine believes he won. Sonic reaches Nine's tower and confronts him. When Nine uses more power, the energy becomes unstable and Sonic's friends have an upper hand in fighting the weakened robots.

On top of the tower, Sonic discovers a new power thanks to the Regulators. He is now able to run on air and create shields. Knucks arrives at the top to help Sonic fight Nine. Shadow later comes for assistance too. Sonic jumps onto Nine and they fall through the tower and arrive at the center of his lab. Sonic tries to explain how his hunger for power is destroying the entire multiverse, but Nine keeps fighting. All of Sonic's allies break into the lab, confronting Nine one last time. Nine realizes that things went too far, and apologizes to Sonic. While everyone is sad about the end of the Shatterverse, Sonic comes up with a plan. He tells Nine to pass all of his Prism Energy into the Paradox Prism, in an effort to fix it. Nine does it and it works, but Sonic is left on a very precarious state. Since Sonic wasn't supposed to exist in these worlds, he is now slowly being erased. Nine is able to restore the other Shatterspaces and their Gateways, which transforms Ghost Hill into Green Hill. Nine gives Sonic one last hug before he leaves for his home. Being too weak to move, Sonic's friends help him. Thorn Rose and Birdie fly to take him to the Gateway. When Birdie gets hurt, they start to fall, but the Kraken is there to assist. When the ship lost an engine, beginning to slow down, Shadow is the only one who can carry Sonic through the Void, arriving to the Gateway at the very last second.

Sonic wakes up inside the cave where everything started. He observes all of his friends and Eggman almost frozen in time, moving at an extremely slow pace. Things go back to normal and the fight continues right before the Prism incident. This time, instead of destroying the Prism, Sonic hugs Eggman's mech. This causes the doctor to get frustrated and he punches Sonic. The hedgehog is excited to be reunited with his friends, and they notice he is acting different. They easily defeat Eggman. Shadow arrives at the cave and teleports the Paradox Prism to an unknown location. Later, Sonic arrives with chili dogs while his friends are relaxing on the beach. As he is about to tell Tails and the others about his crazy adventure, a shock wave ruins their picnic. Sonic and friends look up to the sky, and they are ready for another adventure together as they race into battle.

In the Adventures of Sonic the Hedgehogtelevision series, Sonic is a world-roaming Freedom Fighter with a lifestyle similar to a tramp, who fiercely defends the citizens of Mobius from the evil schemes of Dr. Ivo Robotnik and his lackeys Scratch and Grounder in several comical adventures.

One day, Sonic came across a young orphan named Miles Prower and was persuaded to adopt him as his younger brother, as the young fox had no one to live with. Naming his new brother "Tails", the two of them became as close as a real family. While the hedgehog has his trademark attitude, he also tries his best to stand out as a responsible role model for the innocent Tails.

In the Sonic the Hedgehog television series, Sonic lived in Mobotropolis with Princess Sally and the future Knothole Freedom Fighters during their childhood until Dr. Robotnik invaded the kingdom, enslaved the people with the roboticizationtechnology and took control of Mobius. The hedgehog and his friends, however, managed to escape the tyrant by fleeing to Knothole Village in the Great Forest. There, the heroes formed the Freedom Fighters and began a ten year long battle with the doctor to take back their planet, with the hedgehog being one of the main leaders and their primary agent.

In the Sonic Underground television series, Sonic was born as the heir to the throne of Mobius, along with his siblings, Manic and Sonia. Shortly after their birth however, their mother Queen Aleena was dethroned by Dr. Robotnik and they became wanted fugitives, but the Oracle of Delphius prophesied that Aleena and her children would one day defeat the doctor together, but only if she left her children in the care of others until then.

Sonic himself was left in the care of a regular family. During his early childhood, however, his adopted family was captured and roboticized. He then joined his Uncle Chuck and the Freedom Fighters in the battle against Robotnik over the next many years. One day however, Sonic was approached by the Oracle who revealed to him his origin and family. Sonic soon after reunited with his siblings and together they formed the band Sonic Underground where they fought Robotnik while searching for their mother.

In this media, Sonic possessed a medallion that transformed into an electric guitar/laser rifle.

In the Sonic X anime series and its comic seriespublished by Archie Comics, Sonic originally lived on a parallel version of Earth in another Zone. During one of his battles with Dr. Eggman, a massive Chaos Control blast occurred and the hedgehog, his friends and the hedgehog were transported to Earth. Shortly after arriving, Sonic nearly drowned in a pool, but was saved by a 12-year-old boy named Christopher Thorndyke, who he became friends with and lived with. In time, Chris came to have a strong bond with Sonic as he lived a lonely life since his parents were always busy.

Sonic eventually settled down on this new world with his friends and became a famous hero to the human population as he and his friends protected the planet from Dr. Eggman and his continuous attempts to conquer Earth. Eventually, the hedgehog and everyone from his world were forced to return home as their presence threatened to freeze time. Before Sonic could return home, however, Chris, who did not want him to leave, ran off with him. Nevertheless, the hedgehog eventually made his friend come to terms with his feelings and returned home.

Six months after coming back home, Sonic teamed up with his friends and Chris, who had just arrived in his dimension, to fight the Metarex, an alien race of cyborgs that was a threat to the safety of the entire galaxy. With everyone's aid, the hedgehog managed to defeat the Metarex and their leader Dark Oak and saved the galaxy. Upon returning to his home planet, he had his goodbye with Chris, who went home, and Sonic himself went back to his normal battles with Dr. Eggman.

In the Sonic Boom franchise, Sonic is the leader of Team Sonic, a group of heroes who protect Seaside Island and the earth at large from Dr. Eggman and his legion of robots. Though initially kind of a loner, the many trials Sonic faced during his battles against Lyric taught him the importance of teamwork, and he has since grown into a capable and admirable teammate and leader.

In the Sonic the Hedgehog serialized mangapublished by Shogakukan, Sonic is the future self of a young, timid hedgehog boy named Nicky from six years into the future. In times of crisis, unlike the common belief, Sonic takes over his past self's role thanks to a speed-of-light Rolling Attack that allows him to temporarily time travel to the present and Nicky to the future. However, nobody, not even Nicky himself, is aware of this phenomenon. When traveling to the present, the hedgehog fights several threats such as Anton Veruca and Dr. Eggman, defending his younger self and his family from these foes. Along his adventures, he has made several allies such as Tails and Charmy Bee.

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Sonic was a member of the Knothole Freedom Fighters and the beloved, world-renowned hero of Mobius. He was born during the Great War to Jules and Bernadette Hedgehog, and was originally named after his grandfathers (he later legally changed his named to "Sonic" with no offense to his forebears). While very young, the hedgehog lost his parents to the first clandestine roboticization experiments. He was taken in by his uncle, Sir Charles Hedgehog, where he briefly played delivery boy for his uncle's chili-dog stand while spending time in Knothole. Aside from his abnormal speed, Sonic was an average child. Tragedy struck when Charles was captured by Dr. Ivo Robotnik and his forces following the doctor's takeover of the Kingdom of Acorn and roboticized. Sonic and a few others were herded to Knothole by the Original Freedom Fighters, who gave the hedgehog the inspiration that would make him a hero. From there, he threw his full support behind the Knothole Freedom Fighters and fought to liberate the kingdom. Initially, he playfully took on the villain's first few generations of Badniks, growing in skill until, by his mid-teens, he was a true threat to Robotnik's forces and became a beacon of hope for the world.

As Sonic developed his incredible speed, his attitude became legendary. Irreverent, confident, impatient and energetic, he fought constantly and eventually succeeded in overthrowing Dr. Robotnik, and continued the fight against his successor, Dr. Eggman, thwarting his plans, too. During his adventures, he has traveled the globe, and even traversed outer space, alternate dimensions, and time itself. He was named the chosen hero of the multiverse, having throughout his endeavors faced down mad scientists, evil wizards, warmongering aliens and even gods. Following Operation: Clean Sweep, the hedgehog met several loses that lead to the disbandment of the Knothole Freedom Fighters, making him assume leadership of Team Fighters to continue the fight. When the second Genesis Wave was unleashed, Sonic met Mega Man and they joined forces to bring their multiverses back to normal, though the timeline of his multiverse was forever altered in the process.

After the Super Genesis Wave rewrote history, Sonic became virtually indistinguishable from his game counterpart.

In the Sonic the Comic series published by Fleetway Editions, Sonic was once an ordinary (though still fast) brown hedgehog on the planet Mobius. He encountered a kindly scientist named Dr. Ovi Kintobor, who performed experiments on his speed. An explosion resulted in his spines fusing together and turning blue. A later experiment, involving the doctor's attempts to rid Mobius of evil, transformed him into Ivo Robotnik. After several unsuccessful attempts to take over the world, Robotnik finally managed to conquer the planet by sending the hedgehog six months into the future. On his return, Sonic took it upon himself to form a group of Freedom Fighters to depose the villain, which they finally managed to do after countless battles and encounters with other foes and new allies.

In his adventures, Sonic by his loyal sidekick Tails, as well as Amy Rose, Porker Lewis, Tekno the Canary, and others. He has a friendly, though still quite intense, rivalry with Knuckles the Echidna, who frequently accuses the hedgehog of bringing trouble onto his Floating Island.

Sonic can turn into Super Sonic in this continuity without exposure to the Chaos Emeralds (this is due to a dose of radiation he received when the Emeralds were first brought together), but in this form he is out-of-control, bordering on psychotic and he attacks friends and enemies alike. The two were separated for an extended run, but re-united in the series' final story arc.

In Sonic the Hedgehog: The Movie, Sonic lives on Planet Freedom and is one of the defenders of the Land of the Sky, alongside Tails, who protects it from the evil Dr. Robotnik and his forces. He lives with Tails on their own private island.

One day, Sonic and Tails were called by Dr. Robotnik to battle an evil robot named Metal Robotnik and save their planet from destruction. This was however a trick on Robotnik's behalf so the evil doctor could copy Sonic's data into his Hyper Metal Sonic robot. After the doctor succeeded with his plan, Sonic worked together with his friends and allies to stop his metallic copy from destroying the world.

In the Sonic the Hedgehog film series produced by Paramount Pictures and its spin-offs, Sonic is an anthropomorphic blue hedgehog from Mobiuswho was born with immense powers that are desired by many people. He lived with his parental figure, Longclaw, until he was forced to leave his home planet to go to planet Earth. He lived hidden from the society for ten years, until he was forced to leave his home again, since he was wanted by Dr. Robotnik. Trying to escape, Sonic hid in Tom Wachowski's garage, but is discovered and shot by a soothing dart from the police officer, causing him to lose his Rings, his only way to escape. Both had to recover the Rings and escape from the evil Robotnik, who wished to obtain Sonic's powers to conquer the world, but Sonic heroically defeats Robotnik and banishes him into the Mushroom Planet and resettled in Green Hills with the Wachowski family. Later, Sonic found himself in a race to recover the Master Emerald with his newfound partner Tails before it fell into the hands of Robotnik and Knuckles the Echidna. Later teaming up with Knuckles as well, Sonic managed to defeat Robotnik and began to swore to protect the Master Emerald with Tails and Knuckles while they resided with him and the Wachowskis.

In the Legacy of Chris Thorndyke,

And he is reprised by Roger Craig Smith in the English dub and Junichi Kanemaru in the Japanese dub.

In the Classic era and it was shown in the flashbacks and Sonic Generations that he is reprised by Jaleel White in the English dub and like his present incarnation that he is voiced by Junichi Kanemaru in the Japanese dub.

Sonic the Hedgehog (Character)

THEMES[]