Springbonnie

Springbonnie is the third enemy (but second animatronic seen). He walks slowly, but runs somewhat fast. (when you have to find the other exit after finding out the main exit is gone, Springbonnie won't chase you). You can easily tell he's nearby, because his footsteps are quite loud. If i am correct, they are the footsteps that were going to be used in "Those Nights at Fredbear's", a game by Nikson before it got hacked and canceled.

Design
Springbonnie is quite damaged and looks very similar to springtrap. He is greenish-yellow in color and has black eyes when idle, and white eyes (as seen in the picture) when chasing the player. He is missing half of his right ear.

How to stop him.
Springbonnie seems to just keep chasing you until he either gets you, or you manage to stop him. To stop him, you must get to the office and close the door on him. He will knock on it, and then leave. Chica acts basically exactly the same.