Adventure Nightmare is an unlockable character in FNaF World. He first appeared in Five Nights at Freddy's 4 as a more aggressive version of Nightmare Fredbear. Nightmare is, along with Nightmare Fredbear the biggest animatronic of the game before update 2. Adventure Nightmare closely resembles Nightmare Fredbear as both use the same models, except that Nightmare has black fur, red eyes, and golden yellow accessories. He has ten teeth on his upper jaw and nine at the bottom, his jaw is not hinged but rather moves up and down on a piston-like mechanism. Nightmare's attacks are: