Sharpedo Bluff is a location in Pokémon Mystery Dungeon: Explorers of Time & Darkness and its remaster, Pokémon Mystery Dungeon: Explorers of Sky.
The bluff is a cliffside shaped like a Sharpedo and used to be the home of the partner before they joined Wigglytuff's Guild. There is an open space inside the bluff that When the hero, partner and Grovyle return from the future, the partner takes them there to rest as they try and figure out the next move and removes the bushes blocking the entrance. After the hero and partner graduate from the guild, they move to the bluff and live there for the remainder of the game. During the Manaphy chapter, Manaphy's egg hatches inside the bluff and during the Palkia Chapter, Palkia appears inside the bluff and transports the hero and partner to the Spacial Rift.
After Darkrai is defeated, Cresselia can be found waiting at the edge of the exterior where she will offer to join the hero's Team when spoken to.