Pokemon 3D Adventure 2: Pikachu no Kaitei Daibouken
English name: Pokémon 4D: Pikachu's Ocean Adventure
Genres: Adventure, Comedy, Fantasy
Type: Movie, Episodes: 1
Aired: May 20, 2006
Studio: OLM
Source: Game
Rating: PG - Children
Synopsis:
When Pikachu and friends decide to stop by a tropical island for some rest and relaxation, they got more than they had bargained for after Chatot discovers a Treasure Map! They follow the map to Wailord’s Tear, a mysterious place located in a sunken pirate ship. Will Pikachu and friends find the treasure? What mysteries and dangers are in store? Will our pals return safely? Find out in Pikachu’s Ocean Adventure! 

(Source: Bulbapedia)