Nightmare Endo

Nightmare Endo is the animatronic endoskeleton of Nightmare Fredbear. While technically first debuted in Five Nights at Freddy's 4, he was not considered a separate character, or a character at all, until Five Nights at Freddy's VR: Help Wanted.

Physical Apperance
Nightmare Endo is the endoskeleton of Nightmare Fredbear, as can be understood from his appearance and pose. He is a tall and massive metal skeleton with huge curved claws and razor-sharp teeth. Unlike Endo-01 and Endo-02, he has very thick, complex limbs, specially extended in order to steadily hold a bulky body. He has five long, thumbs on his clawed hands, like other nightmarish animatronics, and on his back small steel vertebrae are soldered in a line.

The Nightmare Endoskeleton has an elongated head with a large mouth, with short but sharp white teeth set apart. On top of its head are two frames of large bear ears. The endoskeleton has glowing red-yellow eyes with metal lenses, rather small in relation to its build.

Supreme Custom Night: Revival
To be revealed.

Trivia

 * Nightmare Endo's inclusion in the original Supreme Custom Night was based off a fan character of the base endoskeleton for the Nightmare animatronics.
 * He was reincluded in Supreme Custom Night: Revival due to FNaF VR introducing Nightmare Fredbear's endoskeleton as a separated character by the same name.