Secret Seashell Rewards
There are 50 Secret Seashells hidden throughout Koholint. Collect the indicated number of Seashells and turn them in at the Seashell Mansion, which is located close to Kanalet Castle in Ukuku Prairie, to get the corresponding reward.
Chamber Stone (give to Dampé): Collect 30 Seashells.
Chamber Stone (give to Dampé): Collect 50 Seashells.
Heart Piece: Collect 5 Seashells.
Koholint Sword (Level 2 Sword): Collect 40 Seashells.
Seashell Sensor (signals when you are near a shell): Collect 15 Seashells.