>>33463265SM had no choice but to downplay Mega Evolution. Game Freak had to force players to use Z-Power and it did deserve the spotlight.
We can get all 50 mega stones through Mystery Gift codes now and those megas can be used in Battle Spot. USUM is going to have to have access to all 50 mega stones nomatter what period.
Looks like the focus of USUM is on Z-Power with more Z-Move varieties and Pokemon exclusive Z-Moves.
However, what about this... Lets say that USUM has just enough Mega Evolutions for Gens 1-4 to finish those mega rosters off. I am not saying there will be several mega evolutions, absolutely not. I'm talking about things like Butterfree, Slowking, Froslass, and Flygon to shut everyone up when there are no more Gen 1-4 megas. Here is an example of filling holes for Johto Gym Leaders.
Falkner - M-Pidgeot
Bugsy - M-Scizor
Whitney - ________
Morty - M-Gengar
Chuck - M-Heracross
Jasmine - M-Steelix
Pryce - ________
Clair - M-Gyarados
For example, you could give Pryce M-Weavile. We have a compatible Mega Evolution for every single Kanto Gym Leader already BTW. Aerodactyl, Blastoise, Ampharos, Venusaur, Beedrill, Alakazam, Charizard, Kangaskhan, and many options for Blue.