Robo-Mouse

Robo-Mouse is an invincible enemy appearing in Wario Land 3 in The Stagnant Swamp and The Peaceful Village.

Robo-Mouse is a giant mechanical mole with digging claws and a mouse-like tail that stands, with a strobe light at its tip. It uses its wheels to move and claws to destroy walls in its way. When Wario is present, it will chase Wario and can turn around if Wario leaps over it. Even if Wario is out of reach for the Robo-Mouse, it will move back and forth under Wario despite not being able to reach him. Once it catches Wario with its claws, it will kick Wario out to a certain place out of a "caught" area.