Steam Cave

Steam Cave (Japanese: ねっすいのどうくつ Hot Water Cave) is an unlockable dungeon in and, that can be obtained by activating the Groudon Statue with the Drought Stone to clear the fog at Foggy Forest. After eight floors comes The Upper Steam Cave, consisting of seven floors, and then the first boss, a fake, an illusion created by 's psychic powers is encountered. Uxie is the one who truly guards the area and protects the Time Gear.

After the first visit, the dungeon cannot be revisited until after the credits. Uxie will be the boss of the dungeon on subsequent visits, who, upon defeat, will ask to join the player's team.

Items
There seems to be no connection to items and floor.
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In other languages
Dunsthöhle Cueva Vapor Grotte Etuve Grotta del Vapore ねっすいのどうくつ 热水洞窟