Gloomy Manor

The Gloomy Manor is the first mansion Luigi visits in Luigi's Mansion: Dark Moon. This mansion is similar to Luigi's Mansion from the first game and is a standard, run-of-the-mill haunted mansion in the middle of a storm. It is here that Luigi acquires the Poltergust 5000, the Strobulb, the Dark-Light Device, and the second Dark Moon piece. The sub-bosses are three Poltergeists, and the main boss is a giant purple spider that has been possessed by the Grouchy Possessor, which is located in the Cellar. The manor has three floors and a basement and features five standard missions, a boss mission, and a bonus mission that is unlocked after the player collects all the Boos in the manor.

History
Not much is known about the Gloomy Manor besides that it is abandoned. Professor E. Gadd was using this mansion to observe the ghosts before the Dark Moon shattered. During the time E. Gadd spent studying the ghosts, he made modifications to the mansion, running pipes and wires throughout it. A statue of E. Gadd can be found in the Patio, suggesting that he owned the mansion at some point.

In-game description
I, Professor Elvin Gadd, had been observing the ghosts living in this Gloomy Manor, when suddenly the Dark Moon broke into pieces and the ghosts got all hostile-like!

Objects

 * Poltergust 5000
 * Strobulb
 * Dark-Light Device
 * 13 Amethysts

Bosses

 * Mini-boss: Three Poltergeists
 * Boss: Grouchy Possessor/Spider Queen

Luigi's Mansion 3
In Luigi's Mansion 3, there are several references to its predecessor, including a model of the Gloomy Manor found on the 15th and final floor of The Last Resort.

In the Master Suite's Library, there is a puzzle where the player must spin a pinwheel to spin around an area of the room to create the correct path. Among the choices is a side with a model of the Gloomy Manor and the Dark Moon above it. When the player first examines this, a short clip will play, with suspenseful music as the camera gets closer and closer to the mansion, only for a Golden Goob to pop out of it. It can be examined only once.

Mini Mario & Friends: amiibo Challenge
In Mini Mario & Friends: amiibo Challenge, the Gloomy Manor, as well as its surroundings, forms the setting of Mini Luigi's stages, contained in a world called Moonlight Mansion. The dilapidated fish fountain at the left of the front yard, along with the polygonal alley, sharp bar fences, and light poles with rough spiraled designs, retrieves its decorative roles around the Gloomy Manor.

Trivia

 * This mansion's music played as the background music for the Nintendo 3DS's eShop during Halloween 2014 in North America.
 * The music played before the elevator breaks down in Confront the Source is the Pause Menu music from Mario Strikers Charged.

Maniero tenebroso