Foyer (Luigi's Mansion)
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Luigi never encounters any ghosts in the Foyer, even during the blackout (except for the Gold Ghost that drops the key to the Parlor at the start of the game). All the mirrors (except for the one in the Mirror Room) link to the Foyer, including its own mirror.
The Foyer is the only room (excluding hallways) to have two floors. At first, the door on the first floor is blocked by a force field and requires a special pink key to disappear (which is obtained by defeating Chauncey).
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