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After finding and capturing 266 pokemon, get Regirock, (Vien forest) Regice (Almia castle) and Registeel (Chroma Ruins) go to Hippowdon Temple and get through it until you get to the room with the moving arrow tiles. In the middle there will be a sandy whirlpool. Jump into it and then arrange your Regices on the platforms, and then the door to Regigigas will open.

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15y ago

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