Ash and May prepare for the challenge ahead of them in the Kanto region. May left two of her Pokémon with her parents at Petalburg City in Hoenn. However, before their new adventure, Team Rocket shows up to steal all of Ash's Pokémon and the group must fight to stop their dastardly plan. After stopping Team Rocket plans, May leaves one of her Pokémon with Professor Oak but a Squirtle chooses her as its Trainer and accepts it to her team. Ash also leaves two of his Pokémon he caught in Hoenn with Professor Oak as well but one of his from the lab decides to accompany him on his new journey.