Ah shit, why didn't I think of just finding 5 mega key stones and just having a mega army. JK. But honestly that made me laugh way too hard. I never for even a moment considered that something like that could happen and apparently neither did literally anyone else in the manga. The solution was so simple that noone even tried doing that. X is like "Hold my beer as I MEGA EVOLVE FIVE WHOLE POKEMON and disregard any rules that might have existed and wreck Lysandre". I'm really not sure why I found this so funny but it's one of the few things in this manga that actually got me to laugh out loud and I'm preety sure it's not even supposed to be funny.