Quicksand Cave (Japanese: りゅうさのどうくつ Quicksand Cave) is a dungeon in Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness and Pokémon Mystery Dungeon: Explorers of Sky situated underneath Quicksand Desert. It has a total of 21 floors, with Quicksand Cave consisting of ten floors, Quicksand Pit of ten floors, and Underground Lake. Mesprit serves as the boss of the dungeon, and after the credits can be recruited on subsequent visits. The dungeon is unlocked the day after the player completes the Northern Desert. After clearing the dungeon initially, it cannot be revisited until after the credits.
There seems to be no connection to items and floor.
This dungeon has the same traps as Northern Desert.