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The Giant Volcano (きょだいかざんGiant Volcano) is a dungeon featured in Pokémon Mystery Dungeon: Explorers of Time, Darkness and Sky. In this specific dungeon, the player and his partner have a request from a young Pikachu to take the lost necklace from their mother in the previous dungeon. However, Heatran will be awoken and you will have to fight it. Once it is defeated, the player will be able to get to the Fiery Drum found behind Heatran's resting place.