>>52786047Literally all it would take is one single retcon: “Oh yeah, by the way, NFE Pokémon can mega evolve.” There’s some precedent for this where some NFE Pokémon have gmax forms where their evolved forms do not.
That’s if they bother at all. Personally I doubt they care much about maintaining the sanctity of an old gimmick they have no intention of ever re-using, except in the obligatory remakes.