Gnaw
Gnaw is a large, imposing creature purple in color with blue spots covering it's body; Gnaw also has several rows of sharp teeth and retractable spikes on it's head. The Gnaw is also immune to any form of physical harm, making it undefeatable.
The Gnaw is used by Merlee as a guard in her mansion, it is also said by Tippi that Gnaw is Merlee's favorite pet.
In Super Paper Mario, Mimi, during her takeover of Merlee's Mansion, seemingly chained the Gnaw to a door, making it incapable of attacking. If Mario or Princess Peach were to approach the chained Gnaw, it would try to catch them in it's mouth; if Gnaw succeeded in doing just that, it would give Mario or Princess Peach to some Gnips, who would proceed to throw them out of Merlee's Mansion.
If Mario or Princess Peach managed to obtain a hidden key in Merlee's Mansion, they would need to sneak by Gnaw and use it on the door the Gnaw was near. If Mario or Princess Peach managed to use the key to unlock the door, they would free Gnaw, who would proceed to chase a nearby Mimi all throughout Merlee's Mansion.
