The Josh dude that was leaking all this stuff. He's playing Y and it said AZ created Yveltal. So in X it would tell you he created Xerneas. So he obviously made Zygarde too to maintain order (3rd game plot). He made Mega Evolution and Lucario was the first mega Pokémon ever.
I for one would be delighted if he turned out to be the strongest pokemon trainer in Kalos. We need a champion who doesn't look the part for a change. Great opportunity to showcase a pokemon master who was simply uninteresting in the glory and fame associated with the pokemon league.
"Music washes away from the soul the dust of everyday life." ~Berthold Auerbach *Harvard Class of 2012 *