>>19619809This. Primal Reversion has something to do with natural energy. It's not a real devolution. They just revert to their state when they had more natural energy inside.
Mega Aerodactyl may be the original Aerodactyl, but it need Mega Stone energy to revert to his state.
Also I like this
>>19619825except
>About Aerodactyl, it's confirmed that SCIENTISTS (in Pokéworld) think that it's as it was originally when he was alive before revival. So yeah, Game Freak is not going to change anything, since the blame would be on fictional scientists.(Basically I like the explanation for Mega Stones giving the energy to temporary evolve a Pokémon without meeting the conditions for a proper evolution).