Treacherous Mansion

Treacherous Mansion is the final and longest mansion that Luigi visits in Luigi's Mansion: Dark Moon. It has a museum theme. It is also the location of the final Dark Moon piece. Many rooms on the first floor of Treacherous Mansion are based off of the previous mansions in the game. Also, almost every ghost that Luigi encounters appear here. King Boo comes to this mansion to open the sealed Paranormal Portal to unleash all of the undead to create his army.

Missions

 * E-1: Front-Door Key
 * E-2: Double Trouble
 * E-3: A Train to Catch
 * E-4: Ambush Maneuver
 * E-5: Paranormal Chaos
 * E-Boss: Stop the Knightmare
 * E-Final: A Nightmare To Remember
 * E-Bonus: Terrifying Invasion

Treasures

 * Various types and shapes of gems.
 * Keys

Bosses

 * Mini-boss: Strong Poltergeist
 * Bosses: Big Boo, Tough Possessor (possessing armors) and King Boo

Rooms

 * Veranda
 * Bottom of the Well
 * Guard Tunnel
 * Canyon Side
 * Haunted Catacombs
 * Underground Lab
 * Dungeon Cells
 * Front Entrance
 * West Gallery
 * Dark Age Exhibit
 * Grand West
 * Ice Age Exhibit
 * Gargoyle Roof
 * Kitchen
 * Restrooms
 * Ancient Exhibit
 * Grand East
 * Jungle Exhibit
 * East Gallery
 * West Corridor
 * East Corridor
 * Terrace
 * Study
 * Archives
 * Train Exhibit
 * Aviation Exhibit
 * Nautical Exhibit
 * Space Exhibit
 * East Balcony
 * West Balcony
 * Inner Courtyard
 * Inside the Paranormal Portal.