FusionDex.org

Shelltrum attempts to frighten others away by roaring and flailing its large tongue about wildly. It gets embarrassed and hides its face within the shell on its neck if this tactic fails to scare its target.

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. At night, it burrows a hole in the seafloor with its broad tongue to make a place to sleep.