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nightmare {fnaf 4} Nightmare's appearance is identical to Nightmare Fredbear's appearance, only the costume color is changed to a black color, and the bow-tie and tophat are changed from purple to yellow.

If images featuring Nightmare were brightened, it would reveal that Nightmare's costume is actually translucent, as if his endoskeleton is cloaked in a shadow. As such, nearly all of his endoskeleton can be seen by brightening images of him. The only exception is around his mouth, which looks like an existing material was ripped away from it.