While Teenage Mutant Ninja Turtles: Shredder's Revenge is equipped with an expansive rogues gallery, there are more villains fans would love to see.

The side-scrolling beat 'em up Teenage Mutant Ninja Turtles: Shredder's Revenge is steeped in the colorful aesthetics and characters of the original cartoon from the 1980s and its associated games. Adding to the nostalgic enjoyment are the reappearances of many classic villains from Ninja Turtle's lore such as fan favorites like Bebop, Rocksteady, and Baxter Stockman.

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Shredder's Revenge also includes more obscure characters like Groundchuck, Tempestra, and Wingnut. Even with this expansive rogues roster, there are plenty of villains in the Ninja Turtles media multiverse who make enjoyable additions to the game, especially those from the Archie Comics series which ran parallel to the cartoon.

Appearing in Archie Comics' Teenage Mutant Ninja Turtles Adventures, Mr. Null was the cruel and heartless CEO of a company involved in practices deliberately destructive to the environment. He often worked with other dangerous villains to cause as much chaos and suffering as possible. Null seemed like a normal human at first, but a pair of small horns on his forehead hinted at his monstrous nature.

Eventually, Mr. Null revealed he was committing evil acts in order to become a literal devil, and gained new fiendish powers every time one of his plots succeeded. In Shredder's Revenge, Mr. Null could make repeated appearances throughout a level overflowing with toxic waste produced by his company. Each time he's defeated he could run off only to return with more and more demonic features and abilities to use against the turtles.

A mutant shark hailing from a future where the melted ice caps flooded New York City, Armaggon regularly clashed with the adult Ninja Turtles of his timeline. Using a time-traveling device stolen from the future Donatello, Armaggon encountered the Archie Comics versions of the Turtles when he slipped into the past to salvage valuable wreckage from a deep-sea dump.

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An Armaggon-focused level could be set in the shark mutant's flooded future. Changing up the battles, players would need to fight robots and other enemies that used advanced technology.

When Bebop and Rocksteady disposed of mutagenic waste in the sewers, the chemicals transformed an ordinary planarian flatworm into a humanoid creature driven by an instinctual desire to devour any living organism in its path, including the Turtles.

In addition to being surprisingly strong for an invertebrate, Wyrm can latch onto prey with its toothed, esophagus-like tongue and suck the liquid out of their bodies. Wyrm's creepy but goofy appearance would make for good end boss on a sewer level teeming with other bizarre mutations straight out of a 1950s B-movie.

Originating in the TTPRG Teenage Mutant Ninja Turtles And Other Strangeness, these mutant bear cubs were the subjects of cruel experiments in an animal-testing laboratory. The four — called Pain Bear, Fear Bear, Doom Bear, and Nightmare Bear — could create horrific mental hallucinations that terrorized the residents of the suburban neighborhood where they were hiding.

Despite their monstrous powers, the Terror Bears are mentally just children and are only lashing out over the way they've been treated. The Terror Bears can work well as the bosses of a level featuring frightening illusions and hallucinatory monsters. They may be driven off more easily than other bosses, but they will return with more formidable attacks as their psychic rage builds.

Hailing from Dimension Z, Mister Ogg was transported to Earth through a dimensional gateway created by Krang, who bribed him with antique porcelain — his favorite food — to attack the Turtles. Inspired by Superman's adversary Mr. Mxyzptlk, with an aesthetic and voice based on Pee-Wee Herman, Mister Ogg seemed like an annoying but harmless nuisance.

However, Mister Ogg's reality-warping powers — such as shrinking people and polymorphing entire skyscrapers — made him a formidable opponent. Mister Ogg would work well as the antagonist of a surreal level where his reality-warping powers constantly alter the landscape and create bizarre traps and foes for the Turtles to overcome.

Embodiments of War, Famine, Pestilence, and Death, these beings nearly defeated the combined efforts of the Turtles and their friends the Mighty Mutanimals — a group of mutagen-altered animals who briefly starred in their own comic series. Each of the Horsemen had a unique attack. War could shoot bony spines from his body. Famine could cause a person to starve and shrivel away in minutes

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Pestilence could overwhelm and sicken foes with diseases. Their leader, Death, could manipulate people like a literal puppet master. The Four Horsemen would add a more menacing tone to the level they appeared in. War, Pestilence, and Famine would serve as challenging minibosses while Death waited at the end to reanimate the corpses of his fallen comrades as puppets who fight for him one last time.

A former exterminator mutated into a humanoid cockroach, Scumbug teamed up with Shredder and a group of other villains to destroy the Turtles as revenge for defeating him in a previous encounter. Scumbug wielded a gun that could shoot acid corrosive enough to melt through floors and walls. He could also command huge legions of ordinary cockroaches.

Scumbug would work well as the boss of a level themed around mutated insects and pools of his corrosive chemicals. He might even team up with Baxter Stockman — another insect villain — or fellow vermin-controlling rogue Rat King.

These tree-like aliens are the owners and promoters of the Intergalactic Wrestling Federation, where wrestlers from across the universe come to compete for the entertainment of a massive audience. They have repeatedly "borrowed" the Turtles from Earth, forcing them to compete in matches, even giving the heroes custom outfits to add to the theatrics.

While they aren't evil or malevolent, Stump and Sling are greedy and self-centered, focused only on finding the next big spectacle to promote the IWF. Stump and Sling can be the main antagonists of a level themed around the Intergalactic Wrestling Federation, where the Turtles fight colorful alien gladiators in the duo's asteroid-base stadium.

An intergalactic warlord forced to flee through space after his army was defeated, Dregg repeatedly attempted to become Earth's ruler by manipulating the public into believing he was their savior. When the Ninja Turtles tried exposing him, Dregg launched a propaganda campaign, making the citizens of New York believe the mutants were dangerous criminals.

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Lord Dregg's manipulations could present unique obstacles for the players in Shredder's Revenge. The characters might have to avoid attacks from angry civilians while making their way through the alien warlord's army to finally expose Dregg's machinations.

Shredder's second-in-command and adopted daughter, Karai has appeared in multiple Ninja Turtle storylines where she takes control of the Foot Clan to prevent violent in-fighting after her father is defeated. A skilled swordswoman and intelligent leader, Karai has a rivalry with Leonardo, who has a similar personality and fighting style.

Despite sometimes forming alliances with the Ninja Turtles, Karai's ultimate loyalty lies with Shredder and the Foot Clan, and she'll always turn against the heroes to serve the ninja leader. Karai will make a formidable boss in a level set in the Foot Clan's headquarters. Her advanced knowledge of ninjutsu can allow her to mimic the Turtles' fighting techniques, forcing players to develop different strategies to defeat her.