X was a Pokémon Trainer child prodigy. But now he's depressed and hides in his room avoiding everyone--including his best friend Y. An attack on their hometown by Legendary Pokémon Xerneas and Yveltal, led by Team Flare, forces X outside... Now what?

Our friends have formidable foes to fight--Essentia inside her transforming suit and Xerosic with his clever trap. Plus, they have to reckon with their enemies' powerful Pokémon--Zygarde and Malamar. Now why won't X's Salamè come out of its ball and do battle...?!