You're Springtrap. A smart engineer like green and yellow rabbit animatronic

But on one night of living at the pizzeria with the other animatronics, while you were deactivated, someone broke in, grabbed all your CPU's and switched them

Once you awoken the next morning, you realized you're not in your regular body. Now you look like a bunch of metal parts mashed in random places

You exit out to the main room to see people either, crying, fighting or celebrating now that their bodies have been switched

You switched with: Mangle. | Freddy switched with: Chica | Bonnie switched with: Endo | Foxy switched with: Toy Freddy | Toy Bonnie switched with Toy Chica | BB switched with Shadow Freddy | Puppet switched with: Golden Freddy

On the back of all the animatronics head, in a small rectangle hole, with the label: "CPU Transfer Station" on it. if there is no CPU in it, then the animatronic basically dies and wont work

CPU's are basically the animatronics brain. If they get damaged or switched, it changes their personality, consciousness and take over the body it gets changed with