Hill Monster
The Hill Monster, is a species found in Mario & Luigi: Bowser's Inside Story, during the battle against the Fawful Express.
When the Fawful Express goues into the hole in the hill the hill stands up revealing its legs and feet, and sticks out it's arms. It has two holes for eyes and its large tunnel looks like a mouth.
If the player uses Bowser's fire, the hill will catch fire and damage the fawful express on the inside.