Ash Ketchum arrives in the Kalos region to take on its eight Gym Leaders and its Pokémon League. He teams up with Serena, a new Trainer chasing the title of Kalos Queen, and with Lumiose City Gym Leader Clemont, an inventor, and his young sister Bonnie. Traveling the region together, they meet rivals and Mega Evolution users like Korrina and the Champion Diantha while building toward Ash's gym challenge. This is the seventeenth Pokémon TV season, opening the XY storyline.