Season 05, Episode 18 — “Wanted: Bebop & Rocksteady”
The 1987 Shredder and Krang recruit the 2012 Bebop and Rocksteady, finding them better than their own incompetent counterparts.
Season 05, Episode 19 — “The Foot Walks Again!”
The 2012 Ninja Turtles trains the 1987 Ninja Turtles in order to be ready for a dangerous mission to hunt down 1987 Shredder and Krang while April and Casey enlists Karai and Shinigami in order to track down Bebop (Zeck) and Rocksteady (Steranko).
Season 05, Episode 20 — “The Big Blowout”
After discovering a treacherous scheme, the Turtles, along with April, Casey, Karai and Shinigami, enlists the Mighty Mutanimals in order to defeat Bebop and Rocksteady. Meanwhile the 1987 turtles are trained enough to take down 1987 Shredder and Krang.