Pokemon X-Y 5
Written by Hidenori Kusaka
Illustrated by Satoshi Yamamoto
X and his friends discover Team Flare's plan to eliminate most of the population of Kalos, so they infiltrate their lair and manage to sabotage the Ultimate Weapon. Xerneas decides to fight alongside Y, and Yveltal begins to obey the Team Flare Malva executive.
2nd-6th grade, ages 8-12