Javier - He will always be attacking, to make him less annoying he no longer makes the lights flicker and knocks every 6.5 seconds.

Mr. Monarka - If you use the cameras too much when he's at the door, he will automatically open it up and come in, eventually killing you.

Mindy - She will be invisible and attack quicker, you must listen for her dashing sounds to locate her.

Violet - If spotted at the door, she will perminantly disable the lights and stay at the door for the rest of the night.

Mike - He will make no noise and be invisible at the window (He always goes to the Left Hall prior to that here).

Matty - He will act more like Yoshi from Five Nights at Yoshi's in a way (Let's just say after knocking he will keep going to the other door several times, I don't really know how to explain it sorry if I sound confusing), he will also now move FASTER when you look at the star cove.

Jacky - He will instantly fully wake up if you don't stare at him enough.

Milk - She will be silent going in and out of the vent.

Evil Javier - He will now instantly kill you if you turn on the wrong door light when he appears at the doors (If it was on when he appeared you'll be fine), your panic meter is also hidden.

The Destroyed - He will teleport back to the room before the shock when dealt with.

Organic Abomination - He will make no noise when attacking anywhere (Aside from knocking), the only way to track him is through the cameras, to make him not impossible he gives you longer to react at the doors.

FNAF_Bluerro - He will drain 5% power after every attack, he also attacks more frequently

The Virus - It will be on a random location on the camera it's on.

Give your ideas in comments, maybe