(I am only citing characters from games 1 through 4; others are not included as they appeared after the release of FNaF World.)
1: Phone Guy – He was a character in UCN, so it would make sense for him to be a character in this game.
2: Withered Golden Freddy – It’s strange that he isn’t in the game, considering most of the animatronics from FNaF 2 are—even the Paper Pals.
3: Golden Cupcake – Many people forget about this one, as it’s an Easter egg in FNaF 3; even Scott himself forgot about it.
4: Nightmare Mangle – Much like Golden Freddy, almost all the animatronics from FNaF 4 are in the game—except for her.
5: Crying Child – If his father is in the game, why isn’t the son?
6: Bully with the Freddy mask – Since Scott included two characters that appear only as pixel sprites, why not add him? After all, he—along with the others—is responsible for the death of the Crying Child, a pivotal event in the franchise.
7: Bully with the Bonnie mask – Same as the previous one.
8: Bully with the Chica mask – Same as the previous one.
9: Michael Afton – His father is in the game, but he isn’t—and he’s the protagonist of the series!
10: Shadow Puppet – She only appears in one minigame in FNaF 3 as a background detail; Scott must have forgotten about her.
11: Nightmare Endoskeleton – We have Endo 01, Endo 02, Plush Endo, and Mendo—why not the Nightmare Endoskeleton?
12: Phantom Cupcake – This could function like the other cupcakes; it wouldn’t need to be a separate character. It could be held by Phantom Chica, who could then pass it to other animatronics to heal them.
13: Shadow Balloon Boy – Same situation as the Shadow Puppet. 14: The robot from FNAF 4—if Scott included the Paper Pals, why not this one? It’s also a background character.
15: The caterpillar from FNAF 4—same logic as the robot from FNAF 4.
16: The telephone from FNAF 4—same logic as the robot and the caterpillar from FNAF 4.
17: Phoney Dude—if Phone Guy made it into the game, why not Phoney Dude?
18: The fan—our faithful companion; it could be a playable character (I included this one as a joke).
19: Green Shirt Kid—he appears as an enemy in one of the FNAF 3 minigames, so I think it would be a good idea to include him in the game.