The Joy of Water Pokémon

40 years in the past, the Legendary Celebi flees through time to escape a poacher, accidentally bringing a young boy named Sammy with it. In present times young Sammy encounters Ash and friends in the same forest. They soon discover Celebi, and when a Team Rocket agent arrives to capture Celebi, they must evade the agent and keep Celebi safe while it recovers from its last encounter. But for how long can they keep it safe, and will Sammy be able to make it back to his own time?