Digga-Leg

Digga-Leg is a robotic boss appearing in the game Super Mario Galaxy 2. It resembles a smaller Megaleg with its weak spot being on its underside, containing a Power Star. However, it only has two legs and its eyes emanate a red glow. The only way to defeat it is for Mario to drill through the planet from the opposite position of Digga-Leg and strike its underside. Digga-Leg attacks mainly by stomping around the planetoid. It will occasionally summon yellow drill-creatures. When angered, it will jump high into the air and come plummeting down, damaging Mario if he was in the way. The battle is taken on a small, rocky planetoid in Spin-Dig Galaxy in a mission called "Digga-Leg's Planet". After being hit three times with the drill, the boss succumbs, explodes, and grants Mario the level's Power Star.