First Appearance: Third season episode "Once Upon a Time on Mars Part One"
A Martian Rats posing as a Martian Mice who infiltrated the Freedom Fighters and was paid by the Plutarkians to sabotage the group. Throttle uncovered his betrayal, but the Biker Mice and Stoker were injured and taken prisoner before they could expose him. Mace led the brain-washed Stoker and other Plutarkian forces against the Freedom Fighters, and hurt them badly. But Harley was able to break the conditioning used on Stoker, and what was left of the Freedom Fighters and the Martian Army won the Battle of the Tug Transformer. Mace's final act of revenge was to grab Harley and transport away with her.