Mad Grinder is a large steamroller-like robot with a punk rock-like appearance that appears in Mega Man 7. It is one of the robots that helps Dr. Wily escape from prison and Mega Man fights it during the opening stage in the game.
In MKF, Mad Grinder appears in the level Turbo Turnpike as a mini-boss and is found in the third section, which takes place in a high-speed area. The player must avoid any contact with Mad Grinder at all costs as he or she will be instantly killed, even if fully-powered. The player's only option is to outrun Mad Grinder while evading enemies and other obstacles that also stand in the way. After escaping Mad Grinder, which self-destructs after the player reaches a certain point in the area, the player fights the two bosses in the level Nitro Man and Turbo Man.