Teenage Mutant Ninja Turtles (Rat and Monster Transformations)

The original Teenage Mutant Ninja Turtles cartoon was full of transformations, and Daymon recommended featuring three of them. Putting aside from the mutation scene in the first episode, there's also... Vernon's rat-man transformation: The Turtles' secondary mutation into monsters:


Michelangelo's later, even better mutation into a nastier-looking monster--keep watching until you're past the 1:30 mark: Leonardo undergoes a similar transformation several minutes later. And here's a bonus--the anthropomorphic transformations of the Punk Frogs!