Nightmare Balloon Boy

Nightmare Balloon Boy is one of the major antagonists in Five Nights at Freddy's 4. He was added during the game's halloween update.

Physical Appearance
Nightmare Balloon Boy is a nightmarish version of Balloon Boy, having five finger with sharp claws, several pointy sharp teeth all through the mouth, and having a distorted look to him.

Supreme Custom Night
He had the same mechanic as in Ultimate Custom Night, but without the penalty of him jumpscaring you when slunched over and flashed on.

Supreme Custom Night: Revival
To be revealed.