Rocksteady appears in the sequel to the 2014 action film. Teenage Mutant Ninja Turtles: Out of the Shadows. Rocksteady and Bebop were originally two criminals being transported at the same time as the Shredder. After they escape during Shredder's rescue, Shredder finds them and offers them a deal to be test subjects for a new variation of the Mutagen which taps into dormant animal DNA in their system from a point before life on Earth began to evolve in different routes, causing them to mutate into their familiar states. After Baxter Stockman initiates the procedure, Bebop becomes a mutant warthog.