>>54841201Correct in everything except the first line. ORAS has the creation of more megastones in real time without the involvement of the weapon, they are created by the same energy Groudon and Kyogre use to feed their Primal Reversion, which are older than the Kalos war altogether.
You can see this by visiting Wally's cousin in Verdanturf, but only after pic related happens.
>What wonderful timing! I was thinking that I wanted to give this to you... >[You obtained a Gardevoirite!]>Do you remember how light came falling out of the sky a while ago? I found this in the yard that day.Primals and Megas both require the energy of the nature. Most of megastones use the one extracted from sacrificial pokemon by AZ 3000 years ago, but the other, most recent megastones simply came to be after the protagonist of ORAS released the energy a super-ancient pokemon was monopolizing under under Sootopolis.
You do not require any human invention for this energy to exist, only mother nature. That's also why the dragon clan explains that in worlds where the Ultimate Weapon wasn't created megaevolution is "undiscovered", rather than "nonexistent", because the phenomenon originates from something much older than the Kalos war.