Some TMNT stuff really isn't for little kids.

The mutagen in the Teenage Mutant Ninja Turtles Adventures comics once mutated Hamato Yoshi into a humanoid rat, and Donatello, Leonardo, Michelangelo and Raphael into humanoid turtles.[1]

Its effects on Hamato Yoshi and the turtles in this version is more deeply explored in the flashback issue Mutations.[2]


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