Christopher "Chris" Thorndyke is the main human protagonist in the Sonic X anime series and its comic series published by Archie Comics. He is a kind and caring boy who lives in Station Square on Earth. At the start of the series, Chris finds Sonic the Hedgehog at the bottom of his swimming pool and saves him from drowning. He then hosts him, Miles "Tails" Prower, Amy Rose, Cream the Rabbit, and Cheese for most of the series. Chris, very much like Tails, looks up to Sonic like an older brother figure, and is always willing to do whatever he can to help his new friends.
Chris grew up with his grandfather, Chuck Thorndyke, his bodyguard and butler Mr. Tanaka, and his housemaid Ella. He lives in a large, luxurious mansion, due to his parents' success in their individual fields of work. Chris' father, Nelson Thorndyke is a big-wig businessman, who is the president of a software company, while Chris' mother, Lindsey Thorndyke is a movie star. As a child, Chris hardly ever saw his parents, given of how they decided to focus more on their careers to give Chris the best things possible. Even though that his grandfather was generally around to keep him company while his parents were away, Chris become very lonely from the absence of his parents, and from having to spend most of his time alone inside his luxurious mansion as he found it to be pretty empty and boring. At some point, Chris made friends with Danny, Frances, and Helen, who were his classmates, but his relationship with them was not enough to mend his loneliness, since that he still spent most of his time inside his mansion outside of school.
Until that one late night, Chris was awoken by the sound of a splash outside of his mansion. Thinking that it came from the swimming pool, Chris rushed out of the mansion to investigate, discovering that Sonic the Hedgehog has landed in the pool. Without a second thought, Chris dove into the pool and rescue Sonic from drowning. The next morning, Chris was on the phone with his parents, having admitted his actions last night. Eventually he heard that Sonic's friends, Cream and Cheese were captured by the military and held hostage at Area 99. Chris and his grandfather, Chuck aided Sonic as he infiltrated the facility to rescue Cream and Cheese. After rescuing them, Chris also met Tails.
When Chris discovered that Sonic was missing, he informed his friend about this and set out with Tails and Chuck to look for Sonic. When they were unsuccessful in doing so, Chris then heard the news of Dr. Eggman attacking Station Square with his E-23 Missile Wrist, announcing his plans for taking over the world. Tails and Chris set out on the Tornado 2 in an attempt to stop Eggman. They attempt to attack the Missile Wrist, but they were useless against it ans Missile Wrist fought back. When all hope seemed to be lost, Sonic finally arrived and defeated Missile Wrist, while Tails and Chris escorted Sonic, Amy and Knuckles back to Chris' home, though the latter leaves.
Sometime later, Chris learned how Sonic and his friends were sent to Earth by a Chaos Control phenomenon caused by the seven Chaos Emeralds, making Chris figure they could get Sonic and his friends home if they got all the Emeralds together again. Later, Chris got a new homeroom teacher at school named Mr. Stewart, who was actually an undercover G.U.N. agent, sent to observe Chris for anything that could prove useful against Dr. Eggman. As Sonic and his friends went to get a Chaos Emerald that had just appeared though, Chris followed them. However, right before Eggman could get the Emerald. Chris picked it up first, but Eggman quickly snatched it away. Refusing to let him take it, Chris climbed onto Eggman's Egg Mobile to retrieve it. After a struggle between the two, Eggman threw Chris off the Egg Mobile, only to discover Chris took the Chaos Emerald with him. Fortunately, Sonic managed to save Chris, securing the first of the seven Chaos Emeralds.
When signs of a Chaos Emerald having surfaced in Silver Valley appeared, Chris went to investigate with Tails and Amy. After arriving, however, Chris and co. discovered it was a trap laid by Eggman, who captured them in E-47 Pumpty, while he lured Sonic and Knuckles into fighting one another, thanks to duping Knuckles with his deceitful lies. However, Chris and co. managed to escape E-47, and when Sonic and Knuckles joined forces, they managed to defeat Eggman together.
Afterwards, Chris learned that his parents were taking a break from their work to visit him back home. However, on the day of their arrival, Chris found his class interrupted as Mr. Stewart was abruptly thrown out by Eggman's E-51 Intelligente, who took over the class, and quickly gained the respect and support of the kids. However, when Eggman arrived to discover E-51 having apparently gone AWOL on him, he threatened E-51 into swearing his loyalty to the Eggman Empire again and follow his original orders. When Chris then tried to leave for home, E-51 kept him from leaving and forced the class to paint portraits of Eggman. Thankfully, Sonic arrived after wondering about Chris being late and destroyed E-51, leaving Eggman to depart in defeat again. Sonic then reminded Chris that he needed to get home, and Chris arrived in time to see his parents again.
The next day, Lindsey was helping prepare a dinner for her and Chris. However, she soon had to return to work, leaving her upset at thinking she was a bad mother for leaving Chris like this without saying goodbye first. When Chris discovered this, he began to think ill of his mother, causing Cream, who had been pretending to be a stuffed animal to fool Ella, Mr. Stewart, and Sam, to break her ruse and yell at Chris in fury for thinking bad of his mother after she overheard Lindsey earlier, before running out in a huff. Later though, Chris was able to make amends with Cream for what happened.
When Eggman began sucking up satellites with his E-90 Super Sweeper, Sonic and Tails were unable to reach orbit to face it in the Tornado 2. Tails and Chuck thus made the X Tornado, allowing Chris to join Tails and Sonic as they went into space to deal with E-90. When Sonic was frozen solid on the outside of the X Tornado's fuselage due to the freezing temperatures of the altitude they were at, Chris uses one of the cables in the cockpit to provide a means to thaw Sonic out using Ring energy, allowing him to destroy E-90.
Chris soon after had to attend the opening of Hotel de Blanc at Emerald Coast on behalf of his parents, providing Sonic and the others a chance for a vacation at the Thorndyke Family's bungalow. However, Eggman soon arrived to destroy the hotel and make room for his new amusement park, with Chris caught in the middle, leading to another battle in which Sonic and Amy were able to defeat him.
Later, Chris arrived at the soon-to-be-demolished Diamond Stadium when Tails located the turquoise Chaos Emerald that had been found by the stadium's groundskeeper, Albert Butler. When Eggman arrived with his baseball team of E-21 Ballios to challenge Sonic and his friends for it and the green Chaos Emerald, Chris took part in the game, but proved to be no match for the E-21s until a pep talk from Sonic encouraged him from striking out when up at bat again, allowing him to help Sonic and their team take the lead. In the end, Eggman cheated when he lost the lead, resulting in him escaping with the turquoise Chaos Emerald, but the game convinced the team manager to have the stadium's turf moved to the new stadium and keep Albert employed to maintain it.
While Chris was in class one day, a rumor came up that another Chaos Emerald had been found in an abandoned warehouse. Chris went to check it out with Sonic, Tails, and Danny, but were lured in the wrong direction by Rouge the Bat. By the time they discovered the mistake and checked out the warehouse, the trap set by G.U.N. meant to catch Sonic had already caught Rouge, leaving Sonic, Chris, and the others befuddled by the false lead.
However, Chris soon set off with Frances, Tails, and Amy to Tingalin Villa to seek out the yellow Chaos Emerald there, only to be secretly followed by Mr. Stewart, who had installed a tracking device in Chris' new goggles. However, during the search, Chris and the others were attacked by Eggman and his E-35 Funfun. Sonic soon arrived in time to save them, but Eggman quickly escaped with the yellow Chaos Emerald. Sonic, Chris, and the others followed him back to his headquarters, currently under attack by G.U.N. naval and air forces, where Sonic was able to break inside, defeat Eggman and his E-18 Guerra-Hard, and retrieve the turquoise and yellow Chaos Emeralds, while also allowing Rouge, Knuckles, and a G.U.N. commando team a chance to escape before the explosives they planted wiped out Eggman's headquarters.
As a result of Sonic's heroics, Chris and his household members were invited to meet the President at the White House. When Chris brought Sonic the news though, Sonic chose to stay in Station Square to fulfill a request for Chris' classmate, Helen. Chris thus went to the meeting with Chuck, Tails, Amy, Cream and Cheese. When Chris grew worried about Sonic though, he arrived in a commandeered G.U.N. helicopter with Helen, allowing Sonic to meet the President, before Chris and everyone shared a laugh when the President's aide, Jerome Wise, passed out upon discovering that the press he had at the party to take a picture of Sonic shaking hands with the President were fast asleep thanks to his earlier stall tactics until Sonic finally showed up.
Following the meeting with the President, Chris saw Sonic and his friends being granted passports, allowing them to travel in public and not be kept secret anymore. However, they had a hard time getting used to it when they noticed the strange looks they were given by the public on an outing to the mall with Chris and Ella. However, Eggman soon attacked Station Square in his new mobile base, the Egg Fort. Sonic arrived to confront him, and with help from Sam and Mr. Tanaka, Chris was able to retrieve the X Tornado to help Sonic against the Egg Fort, sending it plunging into the ocean. Later, Chris took Sonic and the others on a vacation to the Sapphire Sea, during which they explored a sunken ship, where they found the blue Chaos Emerald. Eggman soon attacked them with his E-57 Clurken from the submerged Egg Fort nearby, but Sonic was able to defeat E-57, allowing Chris and co. to escape with the Emerald.
During a dogfight with the Egg Fort, both it and the X Tornado were shot down over an African Savannah, resulting in Chris, Tails, and Sonic confronting a pair of crooked men who were planning to build a dam and destroy the Savannah in the process. However, thanks to Decoe and Bocoe fighting Sonic in the E-65 Gorru-Gaooh, the construction equipment got destroyed, while the criminals were arrested by the local authorities.
Chris soon brought Sonic, Tails, Amy, Cream and Cheese to the site of his mother's next movie that was being filmed. Later, after the director decided to call it quits after a take of Lindsey in the castle resulted in problems with the audio after two attempts, Chris paid his mom a visit to wish her goodnight. However, Lindsey got kidnapped by King Boom Boo and his fellow Booms, and Chris soon found himself struggling to rescue her alongside Ella, Sonic, Tails, Cream and Cheese, with Amy's help. After the two got tricked by King Boom Boo into freeing him with the Talisman, Amy got possessed by one of his minions and attacked Chris. Just when it looked like Chris was done for though, the possessed Amy showed fear when she saw he was in front of the Talisman, hesitating to attack him out of concern for the relic. Seizing the moment, Chris used the Talisman to free Sonic, who then exorcised Amy, before everyone else was released. The group then escaped King Boom Boo and Chris sealed him and his minions up again with the Talisman. However, Chris forgot to put the Talisman back on its pedestal the right way, meaning that King Boom Boo or his Booms could still escape.
Chris later took Sonic and his friends on a trip to the glaciers on his family's cruise ship, but Sonic proved to be unable to relax due to being surrounded by water, paranoid with wanting to return to dry land. Mr. Tanaka soon arrived with a helicopter full of senior citizens to help Sonic and his friends relax, but it was not until Eggman arrived to attack in his new Egg Fort II, and with support from a senior citizen offering him some advice, that Sonic finally managed to regain his focus. Also aided by an enraged Ella in the X Tornado, Sonic defeated the Egg Fort II.
One night, Chris was awoken from sleep by his uncle, Sam Speed, having arrived to challenge Sonic to a race in his new Rocket Car, which Sonic eventually conceded to. During the race, Chris and Tails arrived in the X Tornado to give Sonic lunch, but Chris was left covered in dust when Sam took off to retake the lead while Sonic was distracted. Chris later appeared at the finish line, where Sonic won by a huge margin.
Chris eventually came along with his friends and Sonic's crew on a trip to the homeland of Mister Tanaka, led by Mr. Stewart, in Japan. After Cheese got flushed down a river however, Chris helped his friends search for it. Eventually, the group discovered a small passage through which they entered a Chao colony. There, Chris and the others were warmly welcomed by its residents. After they found Cheese and played with the Chao, they decided to return to Mr. Stewart. However, Dr. Eggman and his E-66 Da-Dai-Oh soon appeared. When the robot tried to attack the group however, it slid down the mountainside. Although that neutralized the threat, the robot would muddle up the river feeding the Chao colony. Chris and the others thus tried cleaning the pond where the Chao lived until Sonic came and did it for them. After that, Chris could enjoy the evening at a bonfire, learning that Tanaka knew about the Chao colony.
A short time later, Chris received a call from his father Nelson, asking him to come to Filmdom City. The reason was that Nelson wanted his family, Sonic, and his friends there as he was planning on surprising Lindsey for their wedding anniversary by appearing on the set of her latest movie to present her with a ring he got for their anniversary while in disguise as one of her co-stars. However, when he revealed the ring to Chris and co., it turned out to be the purple Chaos Emerald, which reacted violently to the blue one Sonic was carrying before being subdued. During the rehearsal for the scene Nelson would present the Emerald to Lindsey in, he ended up ruining the whole plan and exposing the Emerald again, causing it to react to both the blue and red ones Sonic and Knuckles were each carrying, destroying much of the sound stage's equipment before Mr. Tanaka subdued it. Lindsey was furious as a result, but before Chris' parents could get too deep in arguing, the set got crashed by the Egg Fort II, setting in motion events that left the purple Chaos Emerald in Eggman's possession, before E-74 Weazo attacked everyone. When E-74 threatened Chris, Lindsey, and Ella, Nelson protected them, but Sonic and Knuckles managed to lure E-74 away and destroy him, while Eggman escaped with the Emerald. Afterward, Chris and his mother were relieved that Nelson was alright, before cheering Tanaka up after the butler thought he had failed his duty to protect the Thorndykes. With all matters settled, Chris encouraged everyone to celebrate his parents' anniversary, which they did.
Later, Sonic found himself unable to stop running when a microchip from Eggman's E-88 Lightning Bird got stuck in his ear unnoticed. Chris and his friends made several attempts to stop Sonic with various traps, but they all failed. Thankfully, Sonic eventually got the microchip out himself.
With everyone looking for the last missing Chaos Emerald, Chris began feeling depressed, knowing that once they had all seven, Sonic and his new friends would leave him and head home. When Steward convinced Chris to think about his friends first though, the decision was made for Chris and Knuckles to meet with Eggman and call a truce so they could work together to get those among them home. After Eggman agreed and asked for the Chaos Emeralds to be brought to him for safekeeping, Chris took the four Sonic had, and the one Knuckles had, to the Egg Fort II. After dropping them off, Chris and Knuckles witnessed E-77 Lucky report that he had found the last Chaos Emerald. Seizing the moment, Eggman ejected Knuckles from the Egg Fort II and took Chris hostage, revealing to Chris that he planned to establish the Eggman Empire on Earth and had no interest in their truce. With that, he launched the Egg Fort II to go meet with Lucky.
Shackled to the back wall of the Egg Fort II's cockpit, Chris was left helpless as he watched Eggman deal with Sonic and G.U.N., only able to cheer Sonic on and taunt Eggman. However, when Eggman turned the Egg Fort II into the E-99 Eggsterminator, fueled by power from the six Chaos Emeralds he now possessed, Chris saw Sonic get beaten into a pulp by the Eggsterminator, struggling against his restraints and shouting Sonic's name in anguish. Finally, when the Eggsterminator drop-kicked an unconscious Sonic into the ocean, it became too much for Chris to bear. Breaking free of his restraints and grabbing the Emeralds, Chris was left in a heavily injured state. When Knuckles then broke into the cockpit to rescue Chris, Rouge carried him off in the confusion. However, Chris struggled in her arms, causing her to drop him and the Emeralds. Rouge was able to save him, but the Emeralds fell into the ocean. As the Eggsterminator then grabbed Rouge and Chris and attempted to crush them, however, Sonic was revived by the seven Chaos Emeralds, as Lucky had given him his earlier, transforming into Super Sonic. Tearing the Eggsterminator's fist holding Rouge and Chris to pieces, Super Sonic then took down the rest of the Eggsterminator, before inducing Chaos Control.
In the void of Chaos Control, Super Sonic healed Chris of his injuries. Chris hugged Super Sonic, asking him not to leave, but Super Sonic soon disappeared, leaving Chris in deep grief. It soon turned out however, that Chaos Control brought the Mystic Ruins and Angel Island to Earth instead, and Chris' face brightened once more when Sonic appeared before him.
Six months after Super Sonic's battle with the Eggsterminator (during which Eggman had mysteriously gone silent), Chris would pay his mom a visit, where she gave Cream the yellow Chaos Emerald as a gift. Later, the two met another resident from Sonic's world, Big the Cat, who was looking for his pal Froggy, and Chris and Cream agreed to help him. However, some time later, Chris found the Station Square police under attack by Chaos 0 and it was only when Sonic showed up to fight it that Eggman arrived and revealed that he was behind Chaos and planned to evolve it into an unstoppable monster with the Chaos Emeralds to conquer the world with. Stealing Cream's Chaos Emerald, alongside the Emerald he already possessed, Eggman evolved Chaos into Chaos 2. However, Knuckles arrived, demanding to know what Eggman did to the Master Emerald, and together with Sonic, they managed to defeat Chaos 2.
Gathering with his friends to hear their stories, Chris learned from Knuckles that the Master Emerald had been shattered and that Froggy had swallowed the purple Chaos Emerald that Big had found previously. Chris thus agreed to help Big find Froggy, while Sonic and Tails looked for the rest of the Chaos Emeralds to ensure Chaos could not grow stronger. Knuckles also began his search for the shards of the Master Emerald so he could restore it.
During their search for Froggy, Chris and Big managed to fish him up from one of the fishing spots Big found, only for Froggy to then be kidnapped by E-102 Gamma, one of Eggman's E-Series robots sent to hunt Froggy down. Pursuing Gamma to the Egg Carrier, Chris and Big freed Froggy. However, they ended up becoming captives of Chaos when it absorbed the Chaos Emerald from Froggy, along with the Emerald Eggman got earlier from a Flicky, which transformed Chaos 4 into Chaos 6. However, a tag-team effort by Sonic and Knuckles defeated Chaos 6, thus freeing Chris, Big and Froggy from its clutches, leaving Eggman to escape his crashing Egg Carrier in fury. Boarding the abandoned X Tornado, Chris managed to escape the Egg Carrier, but was separated from the others, only to then find the white Chaos Emerald.
With the Emerald in his possession, Chris went to find Sonic, Tails, and Knuckles, who had just discovered from Eggman that Chaos was still alive. When Chris finally found his friends, Chaos ambushed him, forcing Sonic, Tails, and Knuckles to rescue him, but allowing Chaos to get all seven Chaos Emeralds the group had and assume its ultimate form of Perfect Chaos. Chris subsequently flew back to the now flooded Station Square with the others in the X Tornado, but none of their attacks, nor Eggman's Egg Carrier 2, were able to break through Chaos' defenses. Before Chaos could finish them off though, a spirit named Tikal saved them. Chris was later among those who retrieve the drained Chaos Emeralds for Sonic to use, who used their remaining energy to become Super Sonic again to fight Perfect Chaos. During the fight, Perfect Chaos tried attacking Chris and the others, but Super Sonic blocked the attack. Provoked by Perfect Chaos for this attempt at his friends' lives, Super Sonic defeated Perfect Chaos. This purged Chaos of the anger and hatred that had poisoned it for so long and reverted it back to its base form. After Chaos left with Tikal, Chris and the others noticed Eggman had escaped in the confusion, but they knew he would be back.
Because of the damage Station Square sustained from Perfect Chaos, Chris and his family had to move to the capital until the damage to the Thorndyke Mansion was repaired. However, Chris soon discovered that Sonic was wanted by the police and G.U.N. for numerous crimes being carried out by a mysterious hedgehog that looked like Sonic. Locating Sonic soon after, Chris saw Sonic's run-in with his doppelgänger, the Ultimate Life Form, Shadow the Hedgehog. After Shadow fled the scene, the police and G.U.N. cornered Sonic. Sonic pleaded that he was innocent, but Chris begged him to just turn himself in to avoid further trouble, which Sonic did after being told that he was being taken to Prison Island. Despite Sonic having been incarcerated, Chris and Mr. Tanaka decided to bust him out with Tails and Amy. While Tails and Amy took the X Tornado to Prison Island, Chris and Mr. Tanaka headed there in disguise in a boat. Once there, Chris and Tanaka ditched their disguises and got onto the island, but when it was discovered that Eggman had rigged the island to explode, Chris encountered Shadow, thereby proving to him that Sonic was innocent. As Chris got entangled in Shadow's escape, he managed to convince Shadow to transport him off the island to safety via Chaos Control alongside Shadow's partner, Rouge.
After Prison Island's destruction, Chris ended up on Space Colony ARK, where he discovered that Eggman planned to use the colony's Eclipse Cannon to threaten the world into submitting to his rule. Any attempt by Chris to reason with Shadow also fell on deaf ears, as Shadow was convinced by Professor Robotnik to take revenge on humanity for Maria's death.
Once Eggman had all seven Chaos Emeralds, he attempted to fire the Eclipse Cannon at Earth for refusing to give in to his demands. However, he instead triggered his grandfather's doomsday revenge plot, turning the whole ARK into a mega-bomb that would destroy the Earth. While Sonic, Knuckles, Decoe, and Bocoe took the Master Emerald to the ARK's core to defuse the ARK by draining the Chaos Emeralds of their power, Shadow refuses to help, remained convinced that humanity deserved to perish. However, Chris managed to make Shadow remember the full understanding of Maria's last words to him, thereby convincing him to help save the world, but was badly injured by a hostile Shadow in the process. As a result, when Sonic and Shadow went Super to deal with the Final Lizard, Super Sonic momentarily returned to his friends to heal Chris of his injuries. After being healed, Chris watched as Sonic and Shadow destroyed the Final Lizard and restored the ARK to a stable orbit. However, when Sonic returned with only one of Shadow's Limiters, indicating he sacrificed himself to save everyone, Chris was left deeply upset over Shadow's sacrifice before returning to Earth with Sonic and the others.
After moving back home to the Thorndyke Mansion in Station Square, Chris joined his grandfather Chuck when he spoke with the President regarding how the recent Chaos Control used by Sonic and Shadow to stop the ARK had caused more parts of Sonic's world to be brought to Earth, which was troubling the President. While Chuck assured him that there was no problem regarding it, Chris still felt uneasy about everything. He also bore witness when Eggman attempted to make up for the incident with the ARK and his late grandfather's doomsday plot by repairing the Moon, turning it into the Egg Moon. Later at home, Chris watched Amy throw a temper-tantrum regarding Sonic standing her up for a date. As she swung her hammer in frustration however, Chris noticed a loud clunk when Amy seemingly hit something invisible. Some time later, Chris and the others were confronted by Vector the Crocodile and Charmy Bee, two members of the Chaotix, who had come looking for Cream, which led to a scuffle. This scuffle was only broken up when Sonic returned with Vector's client, Cream's mother Vanilla, allowing Cream and Vanilla to reunite, much to Chris' amazement, before everyone picked on Vector for his mistake.
Some time later, everyone gathered on the Thorndyke Family yacht to celebrate the New Year, but soon found their celebration ruined by the Egg Moon eclipsing the Sun. Eggman explained that the Egg Moon was malfunctioning, so he offered his Sunshine Balls as an temporary replacement until the Egg Moon was fixed. However, Chris was shocked when Sonic began destroying the Mirror Towers that provide power to the Sunshine Balls, angering the people of Station Square and causing them to surround the Thorndyke Mansion. After Amy broke down a wall to allow them out, Chris and the others were surrounded by the mob, led by the former aide to the President, Jerome Wise. However, Chris' uncle arrived with the Speed Team and threatened to arrest everyone there if they laid so much as a hand on his nephew. Faced with little options at that point, Jerome and the mob reluctantly disperse, allowing Chris, Tails, and Amy to take the X Tornado to find Sonic, arriving when G.U.N. did to confront him, as he had been fighting Knuckles at the moment. When Sonic attempted to explain his reasons for his actions, Chris was overwhelmed by all the logic, but Tails and Amy understood, and they realized that Eggman had been tricking everyone in another scheme to build the Eggman Empire.
Back at the Thorndyke Mansion, Chris, Sonic, Tails and Amy headed to the White House to rescue the President from Eggman, while Topaz and Rouge went with Knuckles and Mr. Tanaka into space to take out the transmitter on the Egg Moon to end the eclipse. With Eggman, Decoe, and Bocoe on the run, Chris joined in a trap that led to Eggman and his two lackeys finally getting arrested and incarcerated.
As peace settled, Chris had to deal with Amy when she got upset over being stood up by Sonic after they had arranged a date. Fortunately, Sam Speed would show up and help take Amy off his hands.
However, even with Eggman in prison, that did not stop him from sabotaging the appliances being made by Nelson's company, Thorndyke Industries, causing them to turn evil and run rampant, forcing Chris, Sonic, and the others to deal with them while Bokkun busted Eggman, Decoe, and Bocoe out of prison. In the process, Chris also met Emerl, who was able to help deal with the rampaging appliances by copying Sonic's Spin Attack.
With Eggman on the loose again, Chris joined his friends when they tried to infiltrate Eggman's base under Station Square. There, they had to contend with the Egg Spider, which was destroyed by Emerl. Amidst the chaos however, Eggman would escape again.
Hoping to lure him out, the President held the Chaos Emerald Martial Arts Mash-Up tournament. Chris made his way through the competition, but forfeited to Knuckles in the quarterfinals, not wanting to face Amy (knowing that she'll knock him out of the stadium if she gets mad enough) or Rouge (knowing that she'll do anything to win the red Chaos Emerald (the prize of the tournament)) in the semifinals. Emerl eventually won the tournament, only for the energy from the red Chaos Emerald to make him go berserk. When Sonic, Knuckles, Tails, Amy, and Rouge were unable to stop him due to its copy ability, it was Cream and Cheese who finally deal Emerl a death blow when they tag-team it, which prevented Emerl from using his copy ability on them as the other attacked before Emerl could finish duplicating the move he was recording.
Some time later, Chris found himself helping Sonic when Eggman attempted to locate the lost continent of Murasia, having taken the crew of the G.U.N. destroyer Seahawk hostage on his Egg Battleship to ensure neither Sonic nor G.U.N. and their GUN Fort V3 would try to stop him. However, in the end, Eggman's plan for Murasia failed, and Decoe and Bocoe, who Eggman left behind to perish, defect and join Chris, staying at his house.
Christina Cooper and Dr. Kim Bickley both arrived some time later to reveal that the Time Suspension Phenomenon was taking place, threatening to stop time permanently unless Sonic and his friends, along with everything from their world went back home. Heartbroken, Chris thought this was a trick, and decided to confront Eggman on it. However, Eggman had no part in what was happening, and even managed to show Chris that he was acting selfishly by refusing to let Sonic and the others go home. Realizing his mistake, Chris returned home. When Tails and Chuck later completed a portal leading back to Sonic's dimension, it was not long before it was time to say goodbye to everyone as they were sent back to Sonic's world. However, even after everyone else went through and returned to their world, Chris, at the last second, hit the shutoff switch to the portal before Sonic could enter, shutting it down, to everyone's shock. Before anyone could ask Chris why, he grabbed Sonic and fled for parts unknown.
Despite being willing to see everyone else off, Chris refused to let Sonic leave as he felt that, due to his parents and their busy schedules, Sonic's departure would leave Chris feeling all alone again. Fleeing to his family's old lakeside retreat, Chris and Sonic were able to talk, and Sonic finally convinced Chris to let him return to his world. It was then revealed that though Chris had shut down the portal, Sonic has always been able to use Chaos Control with the Chaos Emeralds to return home under his own power. Shortly after Sonic departed, Lindsey and Nelson, who finally understood Chris' feelings and wanted to make up for their absence by spending more time with him, arrived to find Chris waiting for them.
Six years later, at the age of eighteen, Chris has grown considerably. In that time, he and Helen began working together on getting the portal working again to visit Sonic in his world. Eventually, they took a break to go meet with Frances and Danny. As the four friends discussed things regarding events with Sonic and the others so long ago, Chris reminisced about his time with Sonic and all the adventures that they had together.
Early in the third season, he gets the portal working and uses it to travel to Sonic's home in the show. But due to the differences in time-acceleration between both planets, the teleportation process rejuvenates his body back to his pre-teen age. Chris no longer takes the back seat in the X-Tornado; instead, he is shown as flying it capably, which his younger self would never have been able to do so. Chris also comments in one episode that he is a black belt in karate. Additionally, he has also shown to have become a quite capable engineer, enough to impress Tails. He invents different gadgets and devices like Sonic's Hovershoes, a hoverboard and a new, better Chaos Emerald scanner for the Blue Typhoon. He is also seen in a few episodes using Flash Bombs as a distraction and he also uses a laser gun as a weapon.
His support allows Sonic and their friends to defeat the Metarex in numerous conflicts, culminating in the final battle against Metarex leader Dark Oak, that results in the destruction of him, his remaining Metarex forces, and tragically, Cosmo, who sacrificed herself to paralyze Dark Oak so Tails could deliver the killing blow to Dark Oak with Super Sonic and Super Shadow using the Sonic Power Cannon. However, with the Master Emerald having been sacrificed to kill Dark Oak's two remaining generals that fused with him into Final Mova, Chris was stranded in Sonic's world, until Eggman offered a means to allow Chris to return home. There was a catch though: Chris could not take the time to say goodbye to Sonic and his friends as the window for him to return home closed in a few minutes. With little option left, Chris took Eggman up on his offer, boarded the pod, and was launched to return home, as he roared into the sky, Chris spotted Sonic running along the ground below, who looked up and wished Chris good luck before the pod disappeared from view as Chris returned home to Station Square and Earth. As a result, since Chris never got to say goodbye to them, Sonic and his friends all declare war on Eggman.
In the Legacy of Chris Thorndyke, he is the main protagonist of all nine stories.
And he is reprised by Suzanne Goldish in the English dub and Sanae Kobayashi in the Japanese dub.
When he is an adult, he is reprised by Michael Sinterniklaas in the English dub and Masakazu Morita in the Japanese dub.
SAGA 1 - CHRIS THORNDYKE JOINS THE TEAM OF CLOUD[]
In the first (M. Bison) saga, Chris was having a nice life after that Eggman has presumably been defeated by Sonic and his friends, until that he and his mother and father got seriously hurt by a barrage of meteors that was caused by one of Eggman's assailants Sephiroth and murdered his parents without any sense of remorse, but somehow that Sonic and Elise stopped Sephiroth's attack as officers got everyone from the crash safe and sound, including Chris.
After Sephiroth's attack, he was sent to the hospital to heal his wounds and he asked any of his friends of what happened to his parents, but some people don't want to say it, but his grandfather told him that his parents, sadly, did not make it, and he was more heartbroken than he is now. And they all went to the funeral of his now dead parents after the onslaught, but somehow that two figures Cloud Strife and Tifa Lockhart came to his side and talk with him in his mansion after the funeral, and gave him a choice that he can stay at their headquarters as his new home and meeting a bunch of the many friends that the couple have on their "new son"'s new journey ahead of him.
SAGA 2 - THE RISE OF MEPHILES THE DARK[]
In the second (Mephiles the Dark) saga, Chris was somehow finishing up with training with Sonic and Tifa that he was given a towel to dry himself out from sweat, until that he was cleaned, he have heard that three people that he knew would be coming to his new home. (In progress)
SAGA 3 - THE TERROR OF DEVIL KAZUYA[]
In the third (Kazuya Mishima) saga,
SAGA 4 - THE WRATH OF BOWSER[]
In the fourth (Bowser) saga,
SAGA 5 - THE ATTACK OF THE OROCHI ARMY[]
In the fifth (Lord Orochi) saga,
SAGA 6 - THE RISE OF GANONDORF, THE GREAT KING OF EVIL[]
In the sixth (Ganondorf) saga,
SAGA 7 - DEATHBORN STRIKES BACK[]
In the seventh (Deathborn) saga,
SAGA 8/FAKE FINAL SAGA - THE FINAL BATTLE, THE EMPEROR OF THE DARK REALM[]
In the eighth and fake final (The Devil Gundam) saga,
SAGA 9 /TRUE FINAL SAGA - THE TRUE FINAL BATTLE, THE TYRANNY OF THE EMPEROR OF EVERLASTING DARKNESS[]
In the ninth and true final (Tokoyami no Sumeragi) saga,
THEMES[]
- Son of Man (Phil Collins) - Chris Thorndyke's Theme
- Reminiscence: True Pain (Phoenix Wright: Ace Attorney) - The Loss/Funeral of Nelson and Lindsey
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- Can You Feel The Love Tonight (The Lion King) - Chris x Helen
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- The Touch (Stan Bush) - Chris Thorndyke promotes to leader of the Resistance
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- Hero (Skillet) - Vs. Twin Masters and Yami - Phase 2