Bluff the Eavesdropper: A villainous example: The people who stumble across the bare endoskeleton have this happen to them. Mangle even fake hurts herself and blames it on the traitor, who is secretly her, throwing everyone off.
Wham Shot: Near the end, Shadow Freddy reveals himself to be Nightmare and takes everyone's souls to become more powerful. After Nightmare says that there's a traitor among the crew, Mangle walks to next to him, revealing herself to be the traitor.