Remains Island (Japanese: 残された島 Left-Behind Island) is a dungeon in Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team and Pokémon Mystery Dungeon: Rescue Team DX that contains 20 floors. In Red and Blue Rescue Team, it cannot be accessed by normal means in the game and is only available through a Nintendo Event, using the Wonder Mail Code: ??M4 CJY? 44?P CF?8 7J6R (...)M?1.
In Rescue Team DX, it is unlocked after clearing Sky Tower for the first time.
All Pokémon in this dungeon can also be found in the Northern Range and Pitfall Valley, with the exception of Wingull.
In the remake, the last floor contains 2 Pretty Boxes, and 1 False Swipe TM.
Note: The % are rough estimates.