Mega Muth

From the Super Mario Wiki

Super Paper Mario Enemy
Mega Muth

Max HP	200
Attack	8
Defense	0
Card Type	Common
Card Description	This hairy Muth is even grumpier than its herd mates. Probably not the best choice for a petting zoo.
Tattle
List of Catch Cards 150 151 152

The Mega Muth is a sub-species of a Muth in Super Paper Mario. They reside in Castle Bleck and will attempt to attack any intruder. These burly fellows have 200 HP and are one of the toughest enemies that the player will come across throughout the game, and thus are worth a large amount of points. These enemies sometime give players a head start and prepare to charge at Mario, Luigi, Peach, and Bowser. Stronger versions called Dark Muths are found in the Flopside Pit of 100 Trials.