For the original game of a stay at Fredbears back when it was 3D, the animatronics were all planned to have two menachics. Fredbear would originally was gonna go to the door to attack you or break the music box forcing you to repair it, spring Bonnie would go to the door to attack you or spawn his cupcake cakey. Spring bonnie's menachics seem to have been the only animatronic to have two menachics. And then balloon boy was supposed to be in game.

And also since I have discovered new characters in the FNAF series like Mike, that one image of a skull in the files in FNAF 2, and some others, I might add those characters into the game in the next update. And sparky will get its own ending btw. But it will be SUPER RARE.