Once a beloved character, he was left abandoned rotting away to be forgotten. However, it would rebuild itself and began wandering around the restaurant. It began hunting anyone it saw but then, it would watch the stage and children like it was missing it's old life during the day. After that day, if anyone tried to hurt the children or trespassed on the property at night, they would have to deal with Jack.
Well, I changed some stuff from the remake I did about this character. Hopefully this works for you.