Springtrap

Springtrap is a character from the titular Five Nights at Freddy's series. He is the main antagonist of the third game, aka the easiest game.

History
Before Springtrap was a rabbit, he was man. He got off on killing innocent children. When the souls of the children strike back, they forced him to obtain an old rabbit outfit which malfunctioned and killed him. But he's still alive as a rotting corpse in an old rabbit outfit because plot reasons.

FNaF 7
Springtrap appears two times on the box art for Five Nights at Freddy's 7. Despite this, Springtrap does not appear in the game whatsoever, meaning that the whole box art is just false advertising. He also appears on the disc.