I finally found a theory on Marionette, here it goes.This theory states that The Marionette or The Puppet is that the 5th kids' mother became the Marionette. This theory is based off the song 'It's been so long' by Living Tombstone and some of the lines in this. Like many other people, there seems to be a lot of similarities in the video that connects the song to the story of the actual game. "It won't be long before I become a Puppet" This lines I know gives a lot of people the impression that the mother of the 5th child, who went into the Golden Freddy suit, possessed/haunted the marionette suit after she committed suicide or some other event that may had caused her death. And this would be odd as we are shown in the video clip to this song that the Marionette gives life to the four other kids as Freddy, Bonnie, Chica and Foxy, but not to her own son who is given the lifeless body of Golden Freddy. "Since you've been gone, I've been singing this stupid song so I can ponder, the sanity of your mother" This ties into the music box. You have to keep it wind up or else the Puppet will show up. But instead think the box as the mother's sanity. You must keep it wound up or she will just snap.
