Mattermouth

Mattermouths are enemies found in the game Super Mario Galaxy 2 that resemble the skulls of Dry Bones. They also seem to resemble Bone Dragons. They are found in places such as the Haunty Halls Galaxy and Bowser's Lava Lair, and will eat away part of the ground, which will regenerate after a few seconds. If the player falls into the holes in the ground created by the Mattermouths, the player will lose a life. Mario cannot destroy them, but he can stop them temporarily by stomping on their heads, which will turn them around and cause them to begin eating the ground in the opposite direction. If Mario is attacked by one of these enemies, he will lose one wedge of his Health Meter.