
Apollonir in his disguise

Apollonir in his true form
Apollonir was the most powerful Dragonoid Bakuganand the leader of the Legendary Soldiers of Vestroia. In Bakugan: New Vestroia when Drago was defeated and taken by Spectra Phantom, he became Dan'stemporary Guardian Bakugan to help him win Drago back.
Apollonir was the most powerful Dragonoid. He was with a clown who used two Mock Dragonoids to battle against Dan and Drago. When Drago defeated the two Dragonoids, Apollonir took off his disguise and prepared himself to battle Drago. Dan used the Ability Card D-Strike Extreme and repeatedly did that until Drago defeated him. But when Drago still didn't evolve, he explained that he needed to defeat all of his friends to further evolve. In Bakugan Battle Brawlers, his wings resembled leathery insect wings.
Apollonir appeared in Dan's dream and offered Dan to be his temporary Guardian Bakugan after Spectrahad taken Drago. During the battle against Spectra, he easily defeated Viper Helios and Metalfencer, but when Drago was used, he and Dan were backed into a corner. Later in battle Dan used Dragon Proudia, which turned Apollonir himself into a trident. Dan then proceeded to throw him to hit Drago's Perfect Corediamond and freeing him from Spectra's command. Also, Apollonir was revealed to be linked to the Perfect Core and as such, he has the ability to detect Drago from anywhere on New Vestroia.
When Drago says that he can no longer leave New Vestroia due to his link with the Perfect Core, Apollonir explains to Drago that although Drago is linked to the Perfect Core, he had become strong enough to free himself from it.
Apollonir and all the rest of The Six Ancient Warriors battled King Zenoheld and Farbros. Apollonir and all The Six Ancient Warriors were defeated in battle against King Zenoheld and later gave his Attribute Energy to Drago just like the other Six Ancient Soldiers did to the other Bakugan that belonged to the Resistance. This forced Drago to evolve into Cross Dragonoid.
Drago later mentions that the process of giving Drago his Attribute Energy was fatal for Apollonir.
And he is voiced by Garry Chalk in the English dub and reprised by Tetsu Inada in the Japanese dub.