Nightmare Freddy, Wiki

The wiki says that Shadow Freddy appears in The Twisted Ones Novel. Is this true? If so can someone please explain the context? Is that why Nightmare appears on the cover?

Nightmare Funtime Freddy, Baby's Nightmare Circus Wiki

FNAF Wiki pirate-cove

A Nightmare on Elm Street - Wikipedia

Nightmare Foxy (AndrewJohn100), Villains Fanon Wiki

Molten Freddy, Freddy Fazbears Pizzeria Simulator Wiki, Fandom

Foxy, Five Nights At Freddy's Wiki, Fandom

Nightmare Mangle, Wiki

Nightmare Freddy Freddy's nightmares, Fnaf freddy, Anime fnaf