Dizzle, Horrifica, Ocka, and Hairyette in the room.
The unknown number room is the place where Dizzle, Horrifica, and Ocka live.
It is located at The Monster Academy inside the Student Housing. There's no information about the number for this room, but their residents. It is seen in "Oblina Without a Cause".
Its doorway is a derelict space capsule.