The Legend of Zelda: Phantom Hourglass
The Legend of Zelda: Phantom Hourglass
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Phantom Hourglass contains a an island called "Dee Ess Island" - an island in the shape of the DS Lite when shown from the sea and an original DS when shown from the island itself. This concept was almost carried forward into a GameCube Island for Wind Waker but was scrapped before making it into the final game.
Contributed by Petie
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There is an unused dungeon, internally labeled "player_dngn", in the code for Phantom Hourglass. Accessible only in the PAL version and only via devices like Action Replay, the dungeon contains four rooms likely used during development to test interactive objects.
Contributed by Petie