You could delve into theory territory and explore some of the explanations on what he is and if you want you could go over to the FNAF wiki and find out all the games that he has appeared in

Also if you do delve into theory territory just make sure to remind people that it could not be true and you are only bringing it up as a possibility and as for the 6D idk

I searched it up, and in my opinion, it’s BS, the arguments come from this statement about Nightmare Freddy and using this info to say that it being a horror beyond imagination means it “transcends the fifth dimension of imagination”, despite the fact that what the statement is actually saying, is that Nightmare Freddy is scarier than anything a kid could imagine, so, yeah, in my opinion, the statement is BS.

You could comp him with his appearance in FNAF World ig

Nah fnaf world would make nightmare stomp freddy but it may be the only thing that can keep him in the fight

Uh

No

It's still pretty equal. I researched heavily into FNAF World for Comp Afton VS Comp Freddy, and even though I had Afton winning it was VERY close. I'd imagine for Nightmare it's even closer since he doesn't have as much to work with as Springy did

Oh right well then just add that and maybe throw in some possible theories as to what Nightmare could be

And as like a bonus during the end credits you could talk about how each of the possible origins would effect the fight if they were true