Nightmare Freddy

Nightmare Freddy is an animatronic in Ultimate Custom night and was the main antagonist in FNaF 4.

Appearance
Nightmare Freddy is a very heavily damaged version of Freddy Fazbear and has a black top hat and bow tie. He has tears on his fingertips revealing claw-like fingers and half of his right ear is missing exposing wires. He has multiple tears all over his body and his chest has an open hole showing part of his endoskeleton. Some of his toes are missing and he has three mini Freddles around his body that resemble tiny version of him with no tears. He has yellow eyes and lots of very sharp teeth.

Mechanic
Nightmare Freddy: While you aren't looking, mini-Freddies (Freddles) will accumulate on your desk and around the office. Shine your flashlight to scare them away. If you let too many of them gather together then Nightmare Freddy will be summoned, ending your run with a jumpscare.

Strategy
They should be easy to spot in the office and they shouldn't accumulate too fast, so have a check on them from time to time to flash the light on them. You shouldn't let more than 2 accumulate as they will take longer to get rid of.