A small issue I have with Darkus Bakugan in seasons 3 and 4 : r/Bakugan
Bakugan on Twitter: "#Bakugan Darkus Hydranoid is back in #BakuganBattlePlanet ! His multi-headed design truly puts the "Hydra" in "Hydranoid"! With powerful Evolution Cards coming soon, his opponents are surely Doomed! Will
Creeping Darkus - The Bakugan Wiki
Anchorsaur - The Bakugan Wiki
Amazon.com: Bakugan Starter Pack 3-Pack, Darkus Mantonoid, Collectible Transforming Creatures, for Ages 6 and Up : Toys & Games