Springtrap. The completely messed up animatronic. Is also known as Salvage because of its messed up features. He seems to consist of many other Animatronics. Foxy, Bonnie and Toy Chica. I am here to put those theories to rest with what actually happened.
The animatronics were once again tired after a long day of singing for the children. Foxy and Bonnie were talking with eachother. They were talking in low voices so noone could hear them. Chica had been malfunctioning lately so Toy Chica was brought put of storage to replace Chica for the time being. Toy Chica went into the kitchen to make some pizza and cakes for the next day ahead of them. Foxy and Bonnie had went into the kitchen soon after Toy Chica did. Toy Chica had just finished putting a cake in the oven. Toy Chica was surprised to see them both there.
"What are you two doing here?" asked Toy Chica
"We were seeing if we could possibly help put 'icing' on the cakes." Bonnie said
"And you never get visitors in here either. Do you?" Foxy said
"Not really. It gets kind of lonely." Toy Chica said
"Well how about we help you with it. Im sure it would be much more fun with both of us helping." Bonnie said hinting at something
"What do you mean?"
"Oh. You'll see." Foxy said as he locked the door.