Sammy saved a Celebi from a Pokemon Hunter four decades ago, and thanks to the power of time travel, the boy and the mythical creature traveled to the present day. Ash, Misty, and Brock helped Sammy transport Celebi to a healing lake in the forest, but their plans were thwarted by the villainous Viscious, also known as "The Iron Masked Marauder," who sought to capture the powerful Pokemon. Jessie, James, and Meowth also joined forces with Viscious in pursuit of Celebi. Now, the race is on to save the forest and prevent Celebi from falling into the wrong hands.