Satoshi and Pikachu arrived in Miare City of the distinguished Kalos region with the intent to capture more Pokémon and pursue their objective of becoming the very best. By chance, they encountered a brilliant inventor named Citron and his younger sister Eureka during their wanderings around the city. Satoshi promptly challenged them to a battle, but before long, a perilous situation arose. Team Rocket, who had pursued Satoshi into Kalos, instigated a Gaburias to create chaos throughout the city. In the tranquil Asame Town, far away from the commotion, a girl named Serena tirelessly trained in Sihorn riding at the insistence of her professional-racer mother. Upon watching the events unfold in Miare City on television, she realized that one of the participants was a boy from her childhood, who had left a lasting impression on her life. Stirred by the sight of him, Serena resolved to seek him out and embark on a journey to Miare City. The story of Pokemon XY revolves around the team's exploits as they travel around Kalos to pursue their distinct aspirations, with Satoshi facing Pokemon gyms, Citron learning from Satoshi, and Serena seeking to understand her own heart's desire. Along the way, they form new friendships, encounter fresh competition, and continue to foil Team Rocket's plans, while delving deeper into the mysteries of mega evolution.