[MsMarvelDuckie]

Oddly enough I did something along those lines in my Some Other World tale, where Yoshi deliberately mutated himself (and later the turtles) as a means of getting revenge on Saki after Saki forced him out of the Foot because he(Yoshi) was turning it into a gang of thugs and murderers- though it was a Mirror-verse type of story where Splinter and the turtles are actually the villains. Saki gave him a choice of honorable death or life in the shape of the monster he truly was, and Yoshi took the mutagen and ran. Shredder was allies with Krang who was a scientist and inventor in the story. Splinter wanted to use the turtles as his own personal assassins to kill Saki, among other things. Really need to finish that one....