Nightmare

"'Now, let's see how these suckers stand against us!' - Nightmare's first line"Nightmare is the true main antagonist of Season 4: Nightmare-pocalypse in FNAF: The Series. He is described as the older brother of Nightmare Fredbear & uncle of Nightmare Freddy. Like Nightmare Fredbear, he is the nightmare version of Fredbear, but is really the nightmare version of Shadow Freddy.

Appearance
Nightmare resembles that of Nightmare Fredbear. However, he is entirely black & his hat & bowtie are yellow. He has the sharpest teeth & have blood on the tips. He appears to be transparent, as we can see a endoskeleton inside (barely). His eyes are white with bloody red pupils.

Personality
Nightmare is a malicious & more destructive than his brother. However, he serves as the more crazed & powerful nightmare animatronic. However, he thinks his brother is a spoiled idiot who just works on trains.

Powers

 * The same powers as the other nightmare animatronics.

Trivia

 * Nightmare being the nightmare version of Shadow Freddy is a reference to the theory that Shadow Freddy is Nightmare in FNAF 2.
 * It is revealed in the season finale that Nightmare was born in Hell.