Nightmare Freddy

Nightmare Freddy is the titular character in Five Nights at Freddy's 4, and a secondary antagonist. He is the nightmare form of Freddy Fazbear.

Appearance
Unlike his previous appearances, Nightmare Freddy seems completely damaged and more vicious looking. He has a set of sharp teeth and his fingers end with sharp claws. Many small Freddy heads with sharp teeth were filled on Nightmare Freddy's chest.

Five Nights at Freddy's 4
Fredbear's minions, known to the fanbase as Fredlets, begin appearing on the child's bed. The child must prevent the Fredlets from staying on the bed by flashing the light in his face, or they summon Nightmare Freddy, who jumps out from under the bed, and kills the child.

Trivia

 * It is unknown how Freddy managed to get under the bed in the first place.
 * The Fredlets, though menacing, do not even attack the child, only serving to summon him.
 * Jumping out from under the bed is a reference to the legend of monsters underneath children's beds.