Robobird

Robo Birds (ロボバード, Robo Bādo), known in English as Drill Bat, are enemies found in the Game Boy Advance game Wario Land 4. As their name imply, the species is a robotic bird. It only appears in the Hard and S-Hard modes of the game. Robo Bird is blue-gray and has a drill for a nose. Robo Bird flies in a straight line (and even through walls) with its jet pack. Robo Bird can only be defeated by a ground pound to the head by Wario. Robo Birds only appear in the Ruby Passage.