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.