Nightmare Fredbear

Nightmare Fredbear is an animatronic in Ultimate Custom Night and was the main antagonist in Night 6 of FNaF 4.

Appearance
Nightmare Fredbear is a dark yellow and brown coloured bear that is heavily damaged. He wears a purple top hat and bow tie and has red eyes. He has multiple tears all over his body and has sharp claws. He has a huge jaw and a massive row of very sharp teeth. He also has a row of sharp teeth across his chest and he his two buttons: one black and one white.

Mechanic
Nightmare Fredbear & Nightmare: This tag-team duo are invisible to the cameras and can only be seen when they reach your doorways (Fredbear takes left, Nightmare takes right), and even then only their eyes are visible. Close the doors on their faces to send them back into the darkness!

Stratregy
When lowering your monitor, take a look around you for animatronics in doorways and vent openings. If you spot Nightmare Fredbear's eyes staring back at you, slam the door shut in his face!