 While on Earth, Krang allied himself with the Shredder who, along with his robotic Foot Soldier army, moved into the Technodrome.In exchange, the Shredder had to build a new body for Krang, a human-shaped exo-suit which the latter had designed.Shredder lived up to his part of the bargain in the season 1 episode "Shredder and Splintered," in no small part because he was unable to deal with the Turtles himself and needed Krang's help.