Dark Mickey looks like a Mickey Mouse suit. But he is an unfinished suit so you can't see him in the dark and lacks legs and have a smile.
Dark Mickey becomes active starting on Night 2. He starts in the Storage Room, he hides from the camera, and will look at the camera before he exits the Storage Room, he will move to Storage Room -> Staff Area -> Janitor's Closet -> Meat Freezer -> Lounge -> Office. It's unknown on how to avoid him
- Dark Mickey is an unfinished suit, which is similar to Oswald.