Shadow Bonnie is potentially one of the hallucinations that attack the player in Five Nights at Freddy's 2.
Five Nights at Freddy's 2 Edit
Shadow Bonnie is the dark encarnation if the ghost that habitates its own corpse locked inside a Springlock Suit.
Five Nights at Freddy's 3 Edit
A brief cameo is made when in Night 5 is noticed a endarked Shadow Bonnie figure. By touching it, it will automatically enter you into one of the last Mini-Games of the video-game, in wich you play as a glitched RWQFSFASXC.