Nightmare animatronics are creepy hallucination it was created by hallucination gas if this Hallucinogenic Gas were created by William afton it makes sense because nightmare animatronics are not real they are hallucination

A hallucination gas called Hallucinogenic Gas it used to making victims seeing monster animatronics and creating Illusions and hallucinations

Crying child was suffering in fake house with other nightmare animatronics this fake house is also illusions His parents are still alive afton family are nothing killed by nightmare animatronics but only crying child will be kill by nightmare animatronics if he failed to survive

In fnaf 3/five nights at freddy's 3 phantom animatronic are green burn hallucination version of other animatronics and springtrap/William afton is only animatronics that is real one he will kill the player and phantom animatronics are helping springtrap to kill player by scaring him this game, fnaf 3 were have Hallucinogenic Gas

Hallucinogenic Gas can be found in Dittophobia and Five Nights at Freddy's: Sister Location

In some fnaf fangame but there are no Hallucinogenic Gas

Ivang making horror animatronic inspired by original nightmare animatronics called "rusty animatronics" for jolly 3 chapter 2 they are hallucination but they are really not hallucination because they did killed Jack seen in game over there's blood on floor they are probably the vengeful spirits are possessing them and angry at Jack for didn't telling truth about death of Toni (Eric's ex-wife) and Zoey (Eric's daughter) This is the same reason why Jack hallucinated the Metal Animatronics in the Main Security Office in Jolly 3: Chapter 1

In fnac 3/five nights at candy's 3 monster animatronics are monster/nightmare hallucination version of three of them unlike other animatronics they aren't animatronics they are living creature but they are just hallucination

Mary cannot escape from it because there's no door and she's trapped in "Dreamscape"

They are have red growing eye, the monster Rat's head looks like human head but it's humanoid, the rat and the cat are have tails and they can laughing and breathing (anyone can hearing a sounds)