FusionDex

In ancient times, Patrum spread its spores around to mark its territory with fungi. It could sense intruders brushing against the fungi and rampaged viciously whenever a trespasser came forth.

Thanks to its gargantuan jaws, which could shred thick metal plates as if they were paper, it was invincible in the ancient world it once inhabited. A Patrum has parasitic tochukaso mushrooms growing on its back.