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

 * 13 Diamonds
 * Keys

Bosses

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

Rooms
First Floor
 * Veranda
 * Front Entrance
 * Inner Courtyard

First Floor West Side
 * West Gallery
 * Dark Age Exhibit
 * Grand West
 * Kitchen
 * Ice Age Exhibit

First Floor East Side
 * East Gallery
 * Jungle Exhibit
 * Grand East
 * Restrooms
 * Ancient Exhibit

Second Floor
 * Inner Courtyard
 * Terrace

Second Floor West Side
 * West Corridor
 * West Balcony
 * Dark Age Exhibit
 * Space Exhibit
 * Archives
 * Aviation Exhibit
 * Ice Age Exhibit

Second Floor East Side
 * East Corridor
 * East Balcony
 * Jungle Exhibit
 * Nautical Exhibit
 * Study
 * Train Exhibit
 * Ancient Exhibit

Third Floor
 * Gargoyle Roof

Basement 1
 * Veranda
 * Bottom of the Well
 * Guard Tunnel
 * Ceremonial Chamber
 * Cliffside
 * Jungle Exhibit
 * Ancient Exhibit

Basement 2
 * Dungeon Cells
 * Haunted Catacombs
 * Cliffside

Basement 3
 * Dungeon Cells