I’m quite new to making theories and might get something wrong, but still want to make this nonetheless.

I put the Fun with Plushtrap minigame after Fredbear opens because the Fingertrap kid is seen holding it, and the room the minigame takes place in is different from Crying Child’s house, and the four closets (I know the novels aren’t canon but I’ll use them as evidence as parallels) signify the Fingertrap kid is Charlie, and Plushtrap was made by Henry.

FNAF 4 is Michael’s nightmares, as Crying Child’s house died at Fredbear’s and never saw the Freddy’s animatronics.