McCleaver

McCleaver is a squat virus appearing in the MegaMan Star Force series. It is a relatively small virus, with large blades on his hands and a hockey mask. Other varieties include the McDicer and the McSlicer. A McCleaver randomly moves about the field until it intiates it's attack, trying to slice MegaMan three times.

Trivia
Because of the hockey mask it wears, it is probably a reference to Jason Voorhees from Friday The 13th.