Always dead-on target, Groundchuck aims to please Shredder. This mutated weapons expert is the Foot Clan's hooved hoodlum of choice. Chunky and beefy, Groundchuck is Grade A when it comes to grinding up the Turtles. Pushing the Teens to their limit with his electro-prod and Turtle-tethering crossbow, Groundchuck's a cut above the rest. It's lights out for our half-shelled heroes when Groundchuck takes aim with his tranquilizing dart wrist gun. This horned hood has declared open season - and the Turtles are fair game!
Groundchuck is a mutant bull from the original cartoon. He and Dirtbag turned against Shredder to take on the Turtles on their own after they were accidentally mutated by Rocksteady and Bebop. (Planet of the Turtleoids, Part 1)
Groundchuck and Dirtbag later return to cause trouble for Shell-Ri-La. (Escape from the Planet of the Turtleoids)
He also appears in Teenage Mutant Ninja Turtles III: The Manhattan Project as the boss of the second level.