Ash, Brock, May and Max encounter and make friends with Elizabeth, a descendant of the People of the Water who receives an egg of a water-type Pokemon from Jack “Jackie” Walker, a Pokémon ranger undercover. It turns out the egg is the legendary Pokémon Manaphy which Jackie has to deliver to the sea temple. But the evil pirate Phantom wants to have Manaphy, so the crew has to go against him and protect it until it arrives the temple safely.