Jimmy's Appearance

In Jimmy's Revenge, Jimmy becomes more and more monstrous as the film goes on. When he gets the idea of ruining Halloween, his Slasher Smile freezes and his hair gives his ears a pointed look. After he kicks in all of the pumpkins, he walks with a limp. When he decides to make the costumes and candy unavailable by marking them poisoned and flammable, he has a red smear on his lips from the marker and he is seen wearing his devil-costume for the rest of the film. After teepeeing the Spook House in an effort to ruin the party, his features exaggerate further (pointed hair, flared nostrils, sharp teeth). All fo this goes away when he regains his Halloween spirit.

Example of:
Red Right Hand