The Dolphin Bell is a fixture of Nineball Island that the player can interact with in Endless Ocean 2.
Location
The Dolphin Bell can be found at the end of the dock on Nineball Island. It can only be used, however, after the player is introduced to their first dolphin partner - the short-beaked common dolphin with a golden tail fin that lives nearby.
Jean-Eric stands a short distance away from the Bell.
Function
When the player uses the Dolphin Bell, they can choose one of their dolphin partners to train, teaching them various tricks in three different levels of intensity. These tricks can be used in dolphin shows to entertain other divers that show up to Nineball Island. On occasion, the player's dolphin partner may bring them a fresh fish that they can sell to Nancy for some extra money.
One of the possible ways the player can fulfill a later part of the "Be the Best Trainer" quest is to use the Dolphin Bell 100 times.