Ash and friends arrive at a Pokemon Center and Nurse Joy is nowhere to be found. All of a sudden she comes from around the corner with Chansey, but Brock says this is not Nurse Joy. He is right, as Duplica takes off the costume and reveals herself and Chansey goes back to being Ditto. Nurse Joy is currently doing a check up on Duplica's new Ditto, nicknamed "Mini-Dit". Unlike what happened with her first Ditto, Mini-Dit can transform perfectly, but it remains the same size as a Ditto. Knowing this, Team Rocket hatch a plan to steal Mini-Dit ans use it for their evil purposes.

Ash, Pikachu, and Brock take a break by the lake while Misty heads deeper into the forest with Togepi. As Misty picks some flowers, Togepi wanders over to a very strange looking bush. It appears to have legs...spider legs! Summoned by Misty's shrieks, Ash and Brock discover an Ariados in the bush. Just then, Aya, Fuchsia City Gym Leader Koga's younger sister, appears before everyone. She is happy to see them again and tells them that she is studying Pokemon Jujitsu at a nearby Dojo. She invites them to the Dojo where they all decide to take part in the different classes. However, Team Rocket is once again planning to strike and steal as many Pokemon as the can.