Heading back to Lumiose airport after saying goodbye to Goodra, Ash and the gang encounter a remnant vine from the attack. Ash and Greninja notice that the vine is being fueled by some kind of energy in the ground. Having taken it out, Xerosic appears and abducts Clemont. Xerosic tries to brainwash Clemont to accomplish the goals of Team Neo Flare, but he fails to do so. Xerosic ends up arrested by the police. Afterwards, more remnant vines and both Zygarde appear. Ash ends up releasing Greninja in the care of Zygarde to help restore order to Kalos.
A young boy named Ash Ketchum embarks on a journey to become a "Pokemon Master" with his first Pokemon, Pikachu. Joining him on his travels are Brock, a girl-obsessed Rock Pokemon Trainer, and Misty, a tomboyish Water Pokemon Trainer who may have a crush on him. Ash and Co. end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokemon League competitions there.
Along the way, they run into many confrontations with Jessie, James, and Meowth, a trio of Pokemon thieves who are apart of an evil organization called "Team Rocket". But every time Team Rocket try to do their evil deeds, they fail thanks to Ash and his Pokemon.