In the third season, Shredder reveals that they will betray the Kraang and has the entire clan search for Karai before learning that Splinter had survived but lost his memory. It was returned to him by April when she, the Turtles and Casey Jones came to rescue him and she used her physic Kraang powers to bring Splinter to his senses. Shredder later mutated Anton Zeck into Bebop and Ivan Steranko into Rocksteady for Anton's theft of the Kuro Kabuto and Ivan's hunting of Karai. When the two of them tried to attack Shredder in retaliation, Shredder beat them up and told them to either serve him or fall at hand. Ivan and Anton agreed to Shredder's terms—for now. Following a fight with the Turtles, Rocksteady and Bebop successfully captured Serpent Karai and brought her to the Shredder. After the Kraang were defeated and driven back to their home dimension by the Turtles and the Mighty Mutanimals, the balance of power over the Manhattan underworld is shifted over to the Foot Clan. This was done for Shredder by gaining control over the Purple Dragon and other Asian gangs through Hun (and possibly Tiger Claw), several South American gangs through Fishface, the Russian Mafia through Rocksteady, and the Italian Mafia through Don Vizioso. By using this power, Shredder had these crime groups aid him with collecting various chemicals from a chemical company called Aumen, an abandoned Kraang lab and Vizioso for a mind control serum that he planned to create and use on the Turtles, the Mutanimals and Karai. The Foot were also served on at least two occasions by a trio of mutants created from the Shredder's DNA and that of several crustaceans, but these were later destroyed after being fused into the so-called "Mega Shredder."