Mad Grinder is one of the robots that helped Dr. Wily escape from prison. In the intro, he is seen attacking the city and breathing fire. When Mega Man faces him in the Opening Stage, he is shown to have suffered damage during the attack on the city. He attacks by throwing his hair like a cutting boomerang and trying to run over Mega Man with his roller. During the fight against him, he does not breathe fire, presumably because of the damage he received. This is supported by the fact that the pipe on his back, presumably his fuel pipe, is broken.
Mad Grinder is the penultimate boss from the "Search for Wily!" course in Mega Man 2: The Power Fighters and Rockman Battle & Fighters. He appears without damage and has improved abilities, like lifting his roller to smash enemies and breathing fire. He is vulnerable to the Centaur Arrow.
Mad Grinder has a cameo appearance in the background of the stage Dr. Wily's Military Base in Marvel vs. Capcom: Clash of Super Heroes.
Mad Grinder has cameo appearances in issue 20 and 27 of the Archie Comics Mega Man comic. In the first issue, he is seen attacking Mega City while Mega Man is traveling randomly through time, this presumably being a foreshadowing of his future attack. The second took place during the Worlds Collide crossover, in which Mad Grinder appeared aboard the Wily Egg and was amongst the obstacles bypassed by Duo as he made his way up to join Sonic the Hedgehog and Mega Man against the Chaos Devil.
Mad Grinder appears in the manga.
|Mega Man 2: The Power Fighters|
|List of Playable Characters|
|Mega Man • Proto Man • Bass • Duo|
|List of Bosses|
| - Search for Wily! -|
Shadow Man • Plant Man • Gyro Man • Centaur Man • Bubble Man • Heat Man
- Rescue Roll! -
Cut Man • Stone Man • Shade Man • Elec Man • Dive Man • Slash Man
- Recover the new parts! -
Guts Man • Pharaoh Man • Air Man • Quick Man • Gemini Man • Napalm Man
- Dr. Wily -
|List of Special Weapons|
| Shadow Blade • Plant Barrier • Gyro Attack • Centaur Arrow • Bubble Lead • Atomic Fire|
Rolling Cutter • Power Stone • Noise Crush • Thunder Beam • Dive Missile • Slash Claw
Super Arm • Pharaoh Wave • Air Shooter • Quick Boomerang • Gemini Laser • Napalm Bomb
|Rush • Beat • Treble|