X was a Pokémon Trainer child prodigy. He hated being in the spotlight, so he took to hiding in his room and avoiding everyone--including his best friend Y. But now a surprise attack has brought X out of hiding!

The arrival of Mega Evolution Pokémon, each with more than one Mega Evolution, causes a massive battle to break out at the Pokémon Village! As the X-Y arc comes to a clashing finale, the fate of the Kalos region hangs on the outcome.

Can X and Y defeat Lysandre and save Kalos?!