Under the Stairs

Under the Stairs is a secret room in Gloomy Manor in Luigi's Mansion: Dark Moon under the stairs of the Foyer. To access it, Luigi must use the Dark-Light Device in the middle of the left wall of the Patio. There is nothing notable about this room except it has four gold spiders. There are two doors in this room, one that leads back to the Patio and one that leads behind the aquarium in the Foyer, allowing Luigi to get an Amethyst.