King Komodo

King Komodo is a Mutant Komodo Dragon, who refers to himself as Go-Komodo's "half brother". At one time, he was just one of Go-Komodo's pets, but he was accidentally injected with a synthetic Mutagen during the Turtles' rescue attempt of Splinter, but in fact, he had already been purposely einjected prior to that with Mutagen mixed with Go-Komodo's DNA. Believed to have been killed by Donatello's blowing up Go-Komodo's mansion, he was rescued and trained by Pimiko.

In Teenage Mutant Ninja Turtles issue 17 (Image), he killed two children, which caused the local government to warn of alligator attacks. Fearing that Leatherhead had turned completely feral and was behind the attacks, Leonardo went down into Leatherhead's abode to investigate. Instead, he found Leatherhead tied up and gagged, and that it was all a trap set up by King Komodo. Leo fought Komodo and his non-mutated brethren, and during the fight, he bit off Leo's left hand. Leo subsequently passed out from the pain.

Later, Leonardo awakens to find his wound bandaged, and King Komodo kneeling near him. Komodo expositions his story to Leonardo, and the Turtle goes to free Leatherhead. However, King Komodo has the ability to dominate minds more previous than his own, which unfortunately includes Leo's now-free friend. Leonardo and Leatherhead battle, and Leo cuts off Leatherhead's oxygen underwater. When Leo resurfaces, he finds that King Komodo is pointing a rifle straight at him. Fortunately for him, Michelangelo and Casey Jones arrive in time to knock King Komodo into the water.