The wiki says that Shadow Freddy appears in The Twisted Ones

The bite victim is shadow freddy (personal theory/semi headcanon : r/fnaftheories

Twisted Shadow Freddy In UCN! Twisted Ones! (UCN Mods)

FNAF Easter Eggs to Find - FNAF Insider

John (FNAF Novels), Heroes Wiki

Michael Brooks, FNaF: The Novel Wiki

Shadow Freddy, Five Nights At Freddy's Wiki

Fnaf 3 Shadow Freddy by TheBlueLitten on DeviantArt

Five Nights at Freddy's: Fourth Generation / Characters - TV Tropes

Golden Freddy, Five Nights At Freddy's Wiki

Nightmare Shadow Freddy, Five Nights at Freddy's Fanon Wiki

Five Nights at Freddy's: Fourth Generation / Characters - TV Tropes

Five Nights at Freddy's: The Twisted Ones, FNaF: The Novel Wiki

Halloween Foxy

Shadow Freddy, Five Nights At Freddy's Wiki

The 'Five Nights at Freddy's' movie wrapped shooting in New Orleans and fan buzz has grown to “hornets on cocaine” level - Fable House