Hotel Horror is the fourth level of the Sapphire Passage in the Game Boy Advance game Wario Land 4. This stage is based on an old run-down hotel with a lot of numbered rooms that are either opened or locked. A map of the hotel can be found on each of the four floors. It also has an emergency staircase outside. Wario must find his way through this labyrinth of a hotel and find the four jewel pieces and the Keyzer. Some doors are locked and have a frog sign on it. These kind of doors will unlock once Wario hits the switch. The enemies here include Men'ono, Minicula, and Skeleton Birds. This level's CD is called Mr. Ether & Planaria and once collected, it can be played in the Sound Room.