Shredder wanted the two mutants, now called Dirtbag and Groundchuck, to be his new henchmen and go to a museum and steal a giant ruby on display there. But the two did not like to be ordered around and rebelled against Shredder.
Later, they came into a confrontation with the Turtles until they were captured by Kerma and taken to the planet Shell-Ri-La, because he sought help against the dragon Herman the Horrible.
While Kerma led the Turtles to the capital, Ground Chuck and Dirtbag took the opportunity to flee. They allied themselves with Herman, which resulted in a renewed conflict with the Turtles.
After the victory over Herman, Dirtbag and Groundchuck were taken into custody. Later they both managed to escape and allied themselves with the space pirate Captain Dredd to steal Shell-Ri-La's gold machine. However, they once again lost again against the Turtles and were taken back into custody.