Teenage Mutant Ninja Turtles (1987–1996)

Bebop (left) and Rocksteady (right) as they appeared in the original 1987 animated series.

Bebop (voiced by Barry Gordon in most appearances, Greg Berg in some 1989 episodes) and Rocksteady (voiced by Cam Clarke) were introduced in the series as members of a human street gang in New York City that was employed by Shredder. Rocksteady, the gang's leader, was a short and stocky blond Caucasian man (who sported army camouflage pants that would be replaced with simple beige cargo pants later while also occasionally sporting a strong army helmet on his head in his mutated form). Bebop, the second-in-command, was a taller African American man with a purple mohawk. With their fellow gang members Scrag, Grunt, Dopey, and Dumbo, they were sent out to stop a Channel 6 reporter named April O'Neil from doing a report about crime in the city. April ran down into the sewers while being chased by the street gang and met the Teenage Mutant Ninja Turtles, who then defeated the gang in a fight.

After this humiliating setback, The Shredder developed a plan to defeat the Turtles by mutating members of the street gang that Rocksteady and Bebop are a part of so that they would have abilities greater than the Turtles'. Rocksteady and Bebop both volunteered to undergo the procedure first (though neither was particularly aware of what it would entail) with the promise that it would allow them to exact revenge on the Turtles. As the result of being brought into contact with a common warthog and a black rhinoceros that Shredder had abducted from the zoo, Bebop mutated into a humanoid mutant warthog while Rocksteady mutated into a humanoid mutant black rhinoceros.

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. Throughout most of the series, they tried to attack the Turtles with brute force, without applying knowledge and strategy. In the episode "The Missing Map," when the two were accidentally caught in Krang's "brain extraction" machine, the results concluded there was "no data to extract," implying that the two possessed little or no knowledge. 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."

In one episode of the series, Bebop was shown to have kept a pet turtle which got mutated into the evil turtle Slash.

In "Planet of the Turtleoids" Pt. 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 season eight, Bebop and Rocksteady seemed to have some form of intelligence and talked and joked around less. Rocksteady and Bebop's last appearance is in the season 8 finale "Turtle Trek". In that episode, the Turtles destroy the Technodrome's engines, trapping it and its inhabitants in Dimension X for good. While their bosses Krang and Shredder returned in the 10th and final season, Bebop and Rocksteady did not. Their ultimate fate was not explained, although it is assumed that they are still somewhere in Dimension X.

Teenage Mutant Ninja Turtles (2003–2009)

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. Also in that episode, Gen is chased by Kojima, an assassin who happens to be a humanoid warthog.

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.

Teenage Mutant Ninja Turtles (2012–2017)

Rocksteady and Bebop as they appear in the 2012 animated series.

Bebop and Rocksteady appear in the 2012 incarnation, voiced by J. B. Smoove and Fred Tatasciore, respectively.

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. He first appeared in "Enemy of My Enemy," where he met with Shredder for a weapons deal. Shredder didn't seem to trust him very well and had the cargo searched just in case Steranko was pulling any tricks. During the Turtles' fight with Shredder, Steranko got knocked out by the weapon that was being sold to the Foot Clan. In "A Chinatown Ghost Story," it was mentioned that Steranko would pay the Purple Dragons through the roof for the Mystic Dagger.

Bebop was later on introduced as Anton Zeck, an African American professional thief in a high-tech Tron-based suit. He first appeared in "The Legend of the Kuro Kabuto," where he was sent by Steranko to steal Shredder's helmet, the titular Kuro Kabuto. Following his theft, where he left his calling card on a glued-down Rahzar, Zeck ran into the Turtles, who stole the kabuto from him. The Turtles, Rahzar, Fishface, Tiger Claw, and Baxter Stockman fought Zeck over the helmet, but he managed to evade them. When Zeck met up with Steranko in his helicopter, they both discovered that Leonardo swapped the helmet out with dirty diapers at the last minute, to Steranko's rage.

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. The duo succeeded, but Shredder was livid at the revelation that Steranko was behind the theft of the Kabuto helmet and that Karai escaped when the Turtles interfered. An enraged Shredder proceed 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. After made Foot Clan members against their will, the two are sent after Karai before deciding to go after the Turtles instead out of misplaced revenge. 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. They were able to recapture Karai and deliver her to their new master. Rocksteady became the Shredder's connection to the Russian mafia, as mentioned in "Casey Jones Vs. the Underworld".

In "The Noxious Avenger", Bebop and Rocksteady were tasked by Stockman to retrieve a chemical known as "Reagent-X" (and some groceries, to their anger) in order for 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. After witnessing him defeat the Turtles in a later encounter, Bebop and Rocksteady took advantage of the lost and confused Muckman, by convincing him that it was the Turtles' doing for his mutation. Muckman then temporarily helped the duo steal another chemical fighting the Turtles, but eventually came to his senses after noticing Bebop and Rocksteady's true nature when the Turtles rescued him, thus turning on them and destroying the chemical, which caused Bebop and Rocksteady to retreat. In "Meet Mondo Gecko", the two attended Xever's underground mutant race with the rest of the Foot and other mutants who were foes of the Turtles. In "The Deadly Venom," a mind-controlled Karai was able to defeat Rocksteady in combat as part of a test to see if the mind-control serum worked on her.

In "Attack of the Mega Shredder!" the duo are ordered to maintain constant surveillance of the Foot's base, as the Shredder believes the Turtles will soon infiltrate it. Shredder's premonition is proven correct and the two help Tiger Claw and a new trio of Shredder mutants fend off the Turtles. The two capture Leonardo and Michelangelo when they infiltrate the base once again, and prepare to dump them into Stockman's vat of mutagen. However, the two are tricked by Leonardo to create a massive mutant from the Turtles and the three Shredder mutants. Bebop also dumps some sardines into the vat with the Shredder mutants, inadvertently creating a massive Shredder mutant Kaiju that goes on a rampage. After the Turtles defeat the monster, the Shredder is livid at the two, and orders Tiger Claw to deal them a savage beating for their failures.

The duo helped subdue the Turtles to be placed in Karai's traps during "The Fourfold Trap", also suffering a brutal defeat at the hands of Splinter when he came looking for his sons. In "Annihilation: Earth" Pt. 2, when the Triceratons came to Earth with the intention of destroying it, the two helped battle the aliens until Shredder doomed them all by killing Splinter. Terrified, the two embraced each other as they were sucked into the black hole generated by the Triceratons, making them among the first casualties of the destruction of the Earth. However, thanks to Professor Zayton Honeycutt reversing time back six months to before the events of "Annihilation: Earth", the duo were 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. Shredder is beaten by Splinter, and the duo are forced to flee Manhattan with the rest of Shredder's crew.

They reappear at the end of "City at War", where taking refuge in a condominium deep in the woods, the duo act as bodyguards for Shredder as he is cared for by Stockman-Fly due to the injuries he sustained leaving him hooked up to medical equipment to keep him alive before Stockman-Fly injects him with mutagen. 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. After Karai, Shinigami, and Leo are able to 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, are able to rescue them and destroy the factory, 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. They eventually succeeded in breaking through the steel door, where the Turtles, April, and Karai were hiding. The pair clashed with the Turtles several more times before the death of the Shredder in the fourth season finale, "Owari". Despite the death of their master, Tiger Claw, the new leader of the Foot, pressed them into service once again. After the demodragon 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.

In the three-part episode saga Crossover Tales, Bebop and Rocksteady are employed by 1987 counterparts of Shredder and Krang to conquer Earth of both 1987 and 2012 realities along with eliminates both realities' Turtles. 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 super heroes 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.

When Nickelodeon Rocksteady shows up his merits before he joined the Foot Clan, it shows he fought as a volunteer in Iraq, the Yugoslavian Civil War and the Congo Wars.^[9]