Mash (マッシュ Masshu) is a giant clown-like robot that appears in the Robot Museum mid-stage in Mega Man 7, giving time for Dr. Wily to escape with the stolen Guts Man. He hops about trying to squash Mega Man, but Mega Man can hit his head to damage him and knock it off. If his head gets knocked off, Mash will hop erratically until his body can regain the head.
Mash is weak to the Danger Wrap, but it cannot hit him unless his head has been knocked off its body. The Thunder Bolt is his secondary weakness, and can be aimed with much greater effectiveness as it can knock Mash's head off.
Mash appeared in the Rockman 7 manga in a role similar to the game.