Archie Comics
Rocksteady and Bebop were featured in the following TMNT Adventures series, with similar origins and dimwittedness. Like the cartoon, they were punks mutated by the Shredder to help him defeat the turtles. As the series progressed, the animal side of Bebop and Rocksteady surfaced as they dreamed and longed for the 'old days' when they were just animals in the wild (Rocksteady in particular had dreams where he was a real rhino in the wild). When the Shredder and his bunch were defeated by the TMNT in the 'Final Conflict' (issue #13), Rocksteady and Bebop were banished to an Eden-World, a huge paradise planet in Dimension X full of wilderness and natural wildlife, without any humans or similar to disrupt their peace, and they enjoyed it. They became less interested in evil as their intelligence increased.
In issues #23-#25, Krang, who was banished to the toxic waste dump planet Morbus for exiled criminals, befriended two other criminals, Slash and Bellybomb. The group stole a spaceship and headed to Earth and happened to stop along the way at the same Eden-World Bebop and Rocksteady inhabited. Being bored of Paradise, Rocksteady and Bebop join them on the trip back to Earth. However, rather than battle the turtles, the pair left Krang and the villains to fight the turtles and wandered the streets of New York City on their own. They rob a clothing store to get clothes similar to their original attire. They then rob a gun store for some guns. Then they went to the zoo and blasted all the cages, setting all the animals free. Just as the turtles managed to defeat Krang (who had taken over Shredder's body), Rocksteady and Bebop arrived with guns and all the zoo animals, intending to take them back to the same Eden world. The turtles surrendered and let Bebop and Rocksteady escape in the spaceship with the animals. Leonardo asked them to take the defeated Krang and Bellybomb with them back to Morbus in Dimension X (Slash had already left the scene and was wandering the city). Bebop and Rocksteady did as asked and bid the Ninja Turtles farewell. The final panel of #25 shows the two mutants removing their clothes and going back to their simple life in the wilds of the Eden World.
Bebop and Rocksteady maintained the abilities they demonstrated in the cartoon, including their superhuman strength.
Read more about this topic: Rocksteady And Bebop