The Shredder is the true main antagonist in Rise of the Teenage Mutant Ninja Turtles, and the archnemesis of the Ninja Turtles and Splinter.
History
Five hundred years ago, the Shredder was a madman who wore a mystic armor called the Kuroi Yōroi, which "swallowed his soul." He terrorized Japan with the Foot Clan until he was defeated by Splinter's ancestors, who dedicated themselves to making sure the armor never fell into the Foot Clan's hands again.
His exact fate is unknown. Splinter only speaks of him as being "defeated" and "banished," and indicates that reassembling the Kuroi Yōroi will cause him to return.
In "Shadow of Evil", it is revealed that the Foot Lieutenant and the Foot Brute have enlisted Baron Draxum to find the pieces of the Kuroi Yoroi. As a part of the chest piece was placed with the armor, a brief glimpse of the Shredder's face was seen.
After the Kuroi Yōroi is completed in "End Game", Baron Draxum dons the armor and the Foot Brute and Lieutenant address him as Shredder, but he rejects the title. Furthermore, due to a flaw in the armor (the Turtles' Jupiter Jim figure shoved in to cover a hole when the faceplate was used as a tea kettle), the transformation failed to complete. After Draxum was defeated and cast out of the armor, it reassembled itself, having drained Draxum of his life force.
Trivia
- Shredder has a ticklish weak spot behind his right leg.