Big muscular rat with a skull tattoo on his right shoulder. He wears a red west jeans and boots.He also wears a yellow hard hat with a flashlight on top to help him see in those sewers. Doesn't talk much.
- Animals, It's Just a Word! (debut)
- He is probably based of the fact that rats live in the sewers.
- Mutant Rat seems to be based on Dirt-bag, a Teenage Mutant Ninja Turtles' character , as both are mutant rats with tattoos on their right shoulders, hard hats with flashlights on top, male tank tops, jeans pants and boots.
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