Big Fuzz or Robo Corpse is the name of a robot boss. It usually appears after fighting smaller robots and it often is behind a closing door that it opens with its hands (and usually ends with them decapitating it). Its attacks include fire breath, laser eyes and launching timed bombs. Whereas most Contra enemies are based on the Alien movies, this one seems more based on the Terminator franchise (specifically the T-800 Skeleton).