Mutant G.I. Mauler and Shredder's #1 Thug
Weapons: Retro-Mutagen Gun, Manhole Cover Shield, Turtle Carver Knife
Birthplace: La Brea Tar Pits
Height: 5' 7"
Weight: 240 lbs.
Previous Forms: Military Punk/Rhinoceros
Rocksteady's tough rhino body makes him a turtle-bashing powerhouse. His lack of smarts makes him dangerous. This mutant mammal is big trouble with his Retro-Mutagen Gun: one shot can level a whole building or a shelled turtle. Off-duty, Rocksteady loves to fry up a mess of juicy turtle burgers for the whole hungry Foot Clan.
Rocksteady's fieldglasses survey the area for anything that looks like a Turtle. (He's mistakingly blasted six soccer balls). This G.I. rockhead blatantly displays his victory kills with the turtle scalps he wears around his belt.