Kakureimo

The Kakureimo was a slug-like creature that once existed on planet PNF-404.

Description
Due to precise study, it can be confirmed that it was a relatively large creature, a similar size to the standard Bulborb. It had a long set of antennae, three small eyes along the side of its head, and study of the skull revealed a suction-cup like mouth with circular teeth, like that of a cookie cutter.

It's speculated on what kind of creature the Kakureimo was, impossible to truly say what kind of food it ate. Given how little attack power it could do, and with the little protrusions it used for locomotion, it's widely believed to have been a prey animal.