After placing in the Top 8 in the Unova League, Ash & Co. decide to return to Professor Juniper's laboratory Nuvema Town. On the way, they meet with a girl who is just starting on her journey, and decide to help After discussing with Professors Oak & Juniper, Ash decides that he should return to Kanto before decidign where to travel to next. However, soon after that, the trainer they met enters and picks her first Pokémon. To get to grips with training Pokémon, she participates in a tag battle with Ash against Iris & Cilan. However, the battle gets interrupted by Team Rocket, who have returned to Unova...