Spring Bonnie

Spring Bonnie, occasionally spelled Springbonnie, was the earliest iteration of Bonnie and was an entertainer in Fredbear's Family Diner, along with the diner's mascot Fredbear, and was one of the first animatronics created by Henry Emily. Spring Bonnie is a yellow rabbit animatronic bearing an appearance similar to Bonnie. They wore a purple bowtie and two black buttons.

Spring Bonnie is most notable for being one of the few mascots to have animatronic suit hybrids, known as Springlock suits: The springlock suits, springlock hybrids, or springlock animatronics are unique but currently discontinued machinery, They are suits that function as animatronics and costumes in each different mode, which can be switched back and forth by using a crank which winds up the suit. This allows the mechanical gears surrounding the body of the wearer to deactivate, allowing the wearer to slip in-between them. If the suit activates whilst the wearer is inside of it, they will spin inwards and the wearer will be bludgeoned severely, causing them to be crushed and killed. The springlock suits are composed of several individual spring-powered locking mechanisms, hence their name. When one wishes to change a springlock suit from its animatronic form into its suit form, they must insert a hand crank into its designated slot and proceed to turn it firmly into position. Doing so will proceed to coil the springs into their suit positions, causing the endoskeleton parts to be compressed and locked around the sides. When operating a suit, one must be careful not to touch or lubricate any of the springlocks and keep them tightly wound. If these requirements are not met, the wearer of the suit has little chance of survival; the springlocks will come loose and the endoskeleton parts will rapidly recoil inwards, thus impaling the suit's user and causing a slow, painful death. the animatronic is to remain deactivated when being used as a suit.