In "Many Happy Returns", Shredder acted like a feral beast, due to his sapience still being sealed in the Twilight Realm. During the chaos, a heavily weakened Draxum used his remaining strength to escape through a portal the Foot Recruit opened to assist her senseis. After being attacked by the demon, the Foot Lieutenant, Foot Brute, and Foot Recruit retreated to find out what went wrong. After discovering a flux in Shredder's quantum energy, causing him to randomly phase in and out between Earth and the Twilight Realm, Big Mama was able to provide a mystic collar for the Turtles and Splinter to trap Shredder in another dimension, though she made a secret last-minute alteration to this plan.