I found animation error in Bakugan Gundalian invaders episode 21,in this episode at the beggining Drago is Pyrus Helix Dragonoid,and not Pyrus Lumino Dragonoid that is the drago he was in previous
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Bakugan Battle Brawlers | Bakugan Toys | All Things Bakugan » Episode 1: A New Beginning -Gundalian Invaders
Bakugan: Gundalian Invaders | Anime Voice-Over Wiki | Fandom
Bakugan Gundalian Invaders - 01 - A New Beginning - YouTube
Bakugan Battle Brawlers: Gundalian Invaders | Soundeffects Wiki | Fandom
Bakugan Battle Brawlers | Bakugan Toys | All Things Bakugan » Episode 1: A New Beginning -Gundalian Invaders