Upon returning to the present from the future, the player's partner reveals an accessible section beneath a bush, and tells the player and Grovyle that this had been his home before he joined Wigglytuff's Guild. The player and company reside here for a few days before Grovyle goes off to collect Time Gears on his own while the player and partner spread the word about Grovyle's innocence. The player and partner decide that they should go back to the guild and ask for their help. Later, the letter that Grovyle writes informing the player and partner about his current situation is placed here, and can be read anytime after its initial appearance.
After the player's team passes the guild's graduation exam, Sharpedo Bluff becomes the new base for their Exploration Team. Unlike in the guild, however, the player will not be asked to save upon starting a new day, and must manually save by going to their bed. The player must also still return to the Guild to accept jobs.
Sharpedo Bluff is also the home of the Manaphy found as an egg in Surrounded Sea. The player and the partner will raise the baby Manaphy for the first few days after he hatches, and his appetite and sickness will require the team to retrieve Blue Gummis and Phione Dew, for him. During Manaphy's rearing under the team, a third bed is added to Sharpedo Bluff for him. Upon defeating Darkrai, Cresselia can be recruited here.
Over the course of many chapters, Dugtrio from the Guild is found on the bluff looking at the sea. Upon completely beating the game, Dugtrio is found on the beach, rescued by Team Raider.
Spoilers end here.
Exterior at night
Views of the cliff from a distance show that the bluff has a stone that forms the dorsal fin of Sharpedo. When visiting, however, there is a tree where that stone should be.