Leatherhead

Leatherhead is an antiheroic alligator from the 1987 Teenage Mutant Ninja Turtles cartoons

In the 1987 cartoon, he is a mutated villain who made slaves out of the punk frogs until he was captured by the teenage mutant ninja turtles who came to save the frogs. He escaped thanks to Shredder, Rocksteady, and Bebop. Then he went to New York City to get revenge on the turtles, but got captured by the Rat king, and later freed himself and they tried to wrestle him down until they made an alliance to capture the turtles by sending robo-rats and android alligators to fetch them with, then failed and worked toghether again along with the other villains one time with Shredder to capture them.