Sky Stairway is a location in Pokémon Mystery Dungeon: Explorers of Time & Explorers of Darkness and Sky. The dungeon has 50 floors and at the summit Rayquaza can be battled and recruited. Defeating Rayquaza will get you the item Sky Melodica. In Explorers of Sky, Mewtwo can be found, fought, and recruited via a Challenge Letter you will receive directing you to this dungeon to fight him. It is also available in Explorers of Sky via a letter from a mysterious Pokémon in Spinda's Cafe. In Explorers of Time and Darkness, the wonder mail for this dungeon is H W + 8 6 6 % T 5 S 5 1