Gargoyle Roof

The Gargoyle Roof is an area in Luigi's Mansion: Dark Moon, more specifically in Treacherous Mansion. It is the only area on the third floor, and has no main part in the story as no ghosts ever infest it. It can be accessed from the Ice Age Exhibit.

The place is set outdoors and is decorated with gargoyles. The night sky on the background shows a constellation representing a star, but three slots are empty. If Luigi uses the Poltergust 5000 to catch shooting stars or one a gargoyle holds, he can toss it to the constellation. Completing it, the Pebble Diamond is launched from the middle of the constellation and lands on the roof.

History
The Gargoyle Roof can only be accessed in the missions E-2: Double Trouble and E-Bonus: Terrifying Invasion. During these missions, Luigi must pull the mammoth's trunk, causing it to launch him upwards giving access to the area. In other missions, the mammoth is stuck in the ice cave and cannot toss Luigi.