Changes

In ''Battle Planet'' it appears as a two-headed hydra/dragon with mechanical wings. Later on ''[[Armored Alliance]]'' has a more organic aspect, with natural dragon wings instead of mechanical ones.<br/>In ''[[Geogan Rising]]'' becames a three-headed hydra/dragon/centaur; and then, into an Elemental Bakugan on ''[[Evolutions]]''.<br/>''[[Bakugan: Legends]]'' reverted the changes made to Nillious, changing him back into a two-headed bipedal Bakugan for his Nova form; however, his Nova Strength form retains the third head and centaur body design.