Chompy

Chompy, also simply referred to as Chomp in-battle and in Goombario's Tattle, is one of Tutankoopa's Chomps that appears in Chapter 2 of Paper Mario.

Description
Chompy is the only Chomp in Paper Mario that can be battled; during the battle with Tutankoopa, he can summon Chompy to assist him in battle. His only attack is lunging at Mario, dealing three points of damage if not guarded. Chompy has higher-than-normal defense, so Mario must use his Super Hammer or damage-increasing badges like the Power Jump in order to damage him. Chompy is also immune to fire damage from attacks or any items such as the Fire Flower. After Tutankoopa is defeated, he beckons Chompy to come over to him, though it chases him out of Dry Dry Ruins. Chompy, along with two other Chomps, finally catch Tutankoopa at the ending parade of the game.

It is unknown if Chompy is really his name or if it is simply a nickname given to it by Tutankoopa.