Even if Mangle's Gender is a "yes", Scott Confirmed it

The Fact of Mangle still appearing in FNaF 2 and UCN (Ultimate Custom Night) in Ladies Night doesn't leave the confirmation Mangle is Female

Same problem is with Mangle's Phantom and Nightmare Versions, who in UCN appear in Ladies Night too

As a Bonus - Funtime Foxy, who ALSO appears in Ladies Night in Sister Location and UCN, but still was given in the last a Male Voice

P.S. while I was reading the Files, Nightmarionne was described in Russian (my language) as Female Character, yet said Character doesn't appear in Ladies Night in UCN. Confirmation are Male Voice Actor and the Сharacter Icon is not highlighted (this Character is not active)

What else?

Characters, who were confirmed to be Female: Mangle, Phantom and Nightmare Mangle, Bidybab (I, when played Custom Night in Sister Location, at first had a question - "What...?", Funtime Foxy, Chica, Toy Chica, Withered Chica, Nightmare Chica, Jack-o-Chica, Circus Baby, Scrap Baby, Happy Frog, Ballora, Minireenas (they have 2nd Alternative Version of themselves, who appear in both Sister Location and UCN - they're closing the view to the Player), Funtime Chica, Rockstar Chica, JJ (I'm sure people like me prefer to call her Balloon Girl), Dee Dee (she appears in FNaF World and UCN), Lolbit, Bonnet

P.S. even if they're not (!) part of The Freddy Files, it's still a fact Glamrock Chica and Roxanne Wolf from Security Breach are Female. If you want, Vanny/Vanessa also counts

What can I also tell?

It was a good theory during Sister Location/Pizzeria Simulator - that Scraptrap is William Afton and Springtrap is Michael Afton

As much as I hate him, FNaF Play, he's nowadays is the most toxic, worst person in Russian FNaF Community, was thinking that two Springtrap's exist

In The Freddy Files it's also confirmed with the fact - if we'll beat "Golden Freddy" in Sister Location's Custom Night (Max Mode) - we'll unlock a Cutscene, where Springtrap, after Michael Afton is finishing his speach about planning to come and find his father, is coming out of the Horror Attraction (FNaF 3)

But... It was a Good Theory back then...

But we all know Springtrap and Scraptrap are William Afton