[5] Bebop and Rocksteady were featured in the comic book series Teenage Mutant Ninja Turtles Adventures, with similar origins and dimwittedness.
When the Shredder and his bunch were defeated by the TMNT in the 'Final Conflict' (issue #13), Cherubae teleported Rocksteady and Bebop to an Eden World, a huge paradise planet in Dimension X full of wilderness and natural wildlife where there aren't any humans or similar to disrupt their peace.
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.
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).
Although the transformation did make them larger and stronger, they remained bungling, incompetent simpletons, and were completely inept at stopping the Turtles or carrying out Shredder's plans.
Most of the time, the Turtles consider them to be formidable in combat (despite their stupidity) due to their great strength and endurance, and as such, often have to resort to using their surroundings to outwit them rather than fighting them in a straightforward manner.
But their attempts at the turtles seem to regularly fail due to their incompetence and goofing behavior, which all leads to them being abused both physically and verbally by Shredder and Krang, and the former even fired them in one episode.
Rare examples of them achieving success would be capturing Michelangelo in "Cowabunga Shredhead" when he forgets his weapons and using a ray on all four turtles which fills them with fear in the episode "Bebop and Rocksteady Conquer the Universe."
1, Bebop and Rocksteady were responsible for causing a cow and a mole to be exposed to a mutagen-showering machine transforming them into Groundchuck and Dirtbag by accidentally setting the respective animals free at the same time when Shredder and Krang wanted to mutate a lion and a gorilla (which were freed by the Turtleoid Kerma) to be their latest henchmen.
In the 2003 series episode "Fallen Angel", two characters that are dressed like Bebop and Rocksteady and resembling their pre-mutated appearances are seen with the Purple Dragons when Hun was fighting Casey Jones and the Turtles in the ring.
In the episode "Samurai Tourist", the character Gen, also an anthropomorphic rhinoceros, put on human clothing that makes him look almost identical to Rocksteady.
In the Fast Forward episode "Future Shellshock", Michelangelo falls out of a flying truck and onto another vehicle, the driver of which greatly resembles Bebop, only with smaller, more modern sunglasses.
Rocksteady was first introduced in the series as Ivan Steranko, a Russian arms dealer, and artifact collector, an old friend and business partner of the Shredders.
In "Serpent Hunt" and "The Pig and the Rhino", three months after the Kraang conquered New York, a desperate Steranko, and Zeck resolve to capture the mutated Karai in exchange for Shredder securing their safe departure from the city.
An enraged Shredder proceeded to have the duo mutated in Stockman-Fly's lab, Zeck and Steranko respectively exposed to common warthog and white rhinoceros DNA introduced to their two mutagen exposure.
They managed to capture Donatello, Raphael, April O'Neil, and Casey Jones before cornering Leonardo and Michelangelo at Coney Island, the latter serving as a distraction while coming up with their mutant names from the van they arrived in.
Steranko like "Rocksteady" while Zeck was not fond of initially "Bebop", the two ultimately escaping after briefly fighting the heroes over the retro-mutagen batch Donatello had concocted.
In "The Noxious Avenger", Bebop and Rocksteady are tasked by Stockman to retrieve a chemical known as "Reagent-X" (and some groceries, to their anger) to create a mind control serum for Shredder to use on Karai, inadvertently finding some mutagen in the process.
During their battle with the Turtles however, the mutagen they found wound up being thrown by Zeck all over humble sewer worker-turned-garbage man Garson Grunge, who mutated into Muckman.
However, thanks to Professor Zayton Honeycutt reversing time back six months to before the events of "Annihilation: Earth", the duo was revived, and thanks to the Turtles of the future, the Black Hole Generator is stopped, before being destroyed, along with the Triceraton Mother Ship, by the Fugitoid in a kamikaze attack.
They soon are teamed up with Tiger Claw in "Broken Foot" to defend the Auman Chemicals factory from Karai as she begins to systematically take down Shredder's criminal empire one piece at a time.
Karai, Shinigami, and Leo damage the factory but are forced to flee due to being outnumbered by Foot-bots, the duo pursue the Party Wagon, and manage to crash it by removing one of its back tires with their own van's weapons, but the Turtles escape.
They regroup with Tiger Claw to defend the factory producing the Foot-bots, but though they manage to capture Karai, Shinigami, and the Foot Ninja with them, the Turtles, minus Donatello, who was injured by the earlier attack's explosives, all of them are rescued and the factory is destroyed, forcing the duo and Tiger Claw to escape before the NYPD arrived to investigate the destruction.
When their master was fully restored to full strength (and upon receiving a massive dose of special mutagen), they were ordered to seek out the Turtles down in the subway sewers.
After the demo dragon Kavaxas (voiced by Mark Hamill) resurrected the Shredder as a shambling corpse, Bebop and Rocksteady abandoned the Foot Clan for good in "End Times", out of an accurate fear that they were in over their heads.
Despite the frequent mistreatment from Shredder and Krang due to their history with their 1987 counterparts, Bebop and Rocksteady earn their respect before turning upon realizing they intend to destroy the planet and consider becoming superheroes instead.
When the 1987 Turtles return to their reality, they tell the 1987 versions of Bebop and Rocksteady that they're allowed to choose their own lives, causing the two to start re-considering their life choices.