He is the great Original Dragonoid and he created the original Vestroia. He is the ancestor of all Bakugan.
Dragonoid and Dharaknoid were the first two Bakugan ever created by Code Eve. As the original Bakugan, their power was so great that they caused the world to split. Dharaknoid's world became Neathia and Gundalia, and Dharak's direct descendant became Gundalia's Emperor Barodius' Bakugan.
Dragonoid's world became Vestroia, but it quickly split into six worlds (Pyrus, Subterra, Haos, Darkus, Aquos, and Ventus). Dragonoid's direct descendant, Drago, became Dan's Guardian Bakugan and restored Vestroia after turning into the Perfect Core.
He appeared in End of the Line, talking to Dan, Drago, and Mechtavius Destroyer through Dragonoid Destroyer. He then lent his power in order to defeat Mechtavius Destroyer. He then congratulated Dan and Drago upon their win and wished them well in their future adventures.
It was not released in the game, but his type of Bakugan, Blitz Dragonoid, was.