Well. I think about Resources for Pokemon RUBY where I adding all 721 pokemon with formes <NO MEGAS since my Mega System is consist like stationary evolution. For this reason I give only one mega stone and only one Primal Stone. For Primals chose is easier. Only Four. <Groudon, Kyogre, Rayquaza (I know that is mega. But for evolve them use Primal Stone), And Dialga>. For megas chosing is harder. I include most (Not all) Megas. And you have only one stone.>