There's a legend out there, about a Sea Temple created by the People of the Water, where the Sea Crown is kept. No one has ever seen this Sea Crown, and very few people even know the story of the temple, except a few members of the People of the Water who wander through the Pokémon world. That all changes when a Pokémon Ranger named Jackie rescues a Manaphy Egg from a greedy pirate named Phantom! Phantom is absolutely determined to snatch the Sea Crown, and he'll need Manaphy to get to it. To stay one step ahead, Jackie will need to enlist the help of the People of the Water.
A chance encounter with the People of the Water puts Ash, May and friends right in the thick of the action, and May forms a very special bond with the Mythical Manaphy, even as the specter of Phantom hovers ever closer! Together, they must find the Sea Temple before Phantom does, unlocking the secret that connects Manaphy and the Sea Temple!
Mythical Pokémon. It mistook May as Mother when it hatched from the Egg and is able to instinctively reach Underwater Temple of the Sea.
Mascot of Marina Group and is able to stay afloat by inflating the collar around its neck.
Pirate Phantom’s Pokémon which mimics human speech.
Captured by Jackie and sent Jackie to the Sea Temple.
A boy aiming to be a Pokémon Master who embarks on his journey together with his partner, Pikachu.
Max’s elder sister whom decided to journeyed with Ash and friends to become a Top Coordinator.
May’s younger brother. He is dreaming of becoming a gym leader like his father, Norman.
The ex-gym leader of Pewter Gym and is born in Kanto region. He is very knowledgeable about Pokémon and is a good cook.
An evil organization led by Giovanni to conquer the world. Jessie, James and Meowth of Team Rocket seeks to capture Ash’s Pikachu.
- Mime Jr.
Pokémon Ranger who protects the environment with the help of Pokémon and challenged Pirate Phantom to a fight alongside Ash and friends in order to fulfill his mission.
Grandchild of People of the Water and floral star of Marina Group who uses water type Pokémon to create spectacular shows.
Boss of the pirates with outrageous strength and uses high-tech machines such as submarines in order to get hold of Manaphy‘s egg while persistently chases Ash and friends around.
Lizabeth’s family and grandchild of People of the Water who tries to deliver Manaphy to Underwater Temple of the Sea with the help of Ash and friends.