>>48151819>>48151872You're missing the point. It's a coincidence because Z-Moves were created specifically to be a regional gimmick that dies off.
Even now, its Alola's entire identity hinges off of it in the same way that Galar does with Dynamax.
In a theoretical Z-version, they probably would have had a system closer to Sync Burst in Pokken where Pokemon that don't hold a mega stone get a generic power-up.