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{{Nihongo|'''Hydranoid'''|ヒドラノイド|Hidoranoido}} is a hydra-like Bakugan that debut in ''[[Bakugan Battle Planet]]''. It has been seen in the [[Behind the Battle]] shorts alongside [[Nillious]] and [[Serpenteze]]. An [[Aquos (#Reboot)|Aquos]] Hydranoid is used by [[Benton Dusk]]. In addition, a [[Ventus (Reboot)|Ventus]] Hydranoid was seen as a component for [[Hydranoid x Krakelios]] in ''[[Bakugan: Armored Alliance]]''. Another Ventus one appears in ''[[Bakugan: Geogan Rising]]'' and wielded by [[Strata the Hunter]].

*Despite misconceptions, this Bakugan only takes the name of [[Hydranoid]] and is likely based off the [https://en.wikipedia.org/wiki/Lernaean_Hydra Lernaean Hydra], which is why it is an [[Aquos (#Reboot)|Aquos]] Bakugan.