Mega Evolution I!
In the Kalos region, a new type of evolution has been discovered called Mega Evolution and a young trainer called Alan has become obsessed with it. He is travelling the Kalos region, with his Charizard and its Charizardite X Mega Stone with the goal of defeating all the Mega Evolutions that exist. During his travels, he meets several trainers, each with Mega Evolutions until he meets the Elite Four member, Siebold. Will Siebold have a Mega Evolution and will Alan be able to defeat him?