Hammer Joe is a humanoid combat robot created by Dr. Wily and part of the Joe series of robot enemies in the classic Mega Man series. Hammer Joe appears in various stages in Mega Man 3 and has a wide, armoured body. It stands in one spot and swings a hammer flail above its head, opening its eye just before it throws the hammer at Mega Man. Its eye and legs are its weak points, so it can only be hit when its eye is open or if Mega Man can shoot it from a lower elevation. Buster shots will also bounce off the hammer as it is thrown.