S1·E18 He-Man Mutant

After the Galactic Guardians capture Quakke and B.H., the Scientists of Primus create a machine called the Mutator that can turn any human into a mutant. When it is tested on He-Man so that he can spy on Skeletor, it changes more than his appearance as destroys the Mutator and rescues Quake and B.H. Not realizing that the mutant is a transformed He-Man, Skeletor names him Cruncher and takes him in storming the Inner Council's chambers.