Hooligon

The Hooligon is an enemy in Super Paper Mario. Its name is derived from the words "hooligan" and "polygon", the latter referring to its body which is made up of several squares arranged like a snake. The Hooligon slowly hops around, waiting for the player to run into it. Any part of its body may be attacked; however, attacking its tail portions will only serve to shorten its body length. Only its head may be damaged.

Tattle
That's a Hooligon. They are space creatures that are made up of many parts...Max HP is 15 and Attack is 2. It loses pieces of itself as it takes damage...The head is the weak spot...You have to hit it there to defeat it...