Pokémon: The Series Rewrite:Indigo League Part 1

episode 57: beach blank-out blastoise

Ash and the group attempt to get off on the last ship of the day off Cinnabar Island but fail and run into Green again who reveals she's searching for a ultra powerful Pokémon who is on one of the islands. They arrive onto Seafoam Island with the help of Blastoise. They arrive to find a festival of Squirtes and Wartortles worshiping a Blastoise. They find a Articuno and it leads to a battle but Ash is defeated by Articuno and Green is sent flying off into the ocean with Blastoise going after Green never to be seen again. Ash and the group are stuck on Seafoam Island. Misty also catches a Krabby.