Archives

The Archives is a room located in Treacherous Mansion in Luigi's Mansion Dark Moon. Found on the second floor on the east side of the mansion, it's accessible via the East Corridor and is located between the Aviation Exhibit and the Space Exhibit.

In the room itself, there's a table and ladder to the right, four cardboard boxes to the left and very little in the way of other decorations. This room is entirely optional in all missions bar possibly Terrifying Invasion.

History
During E-3 A Train To Catch, Luigi can explore the Archives for extra money. If he examines the boxes to the left in the right order, a Gold Greenie appears that can be caught for cash.

In E-Bonus Terrifying Invasion, the Archives is one of the rooms that may be filled with ghosts.