So Gen 1's perma freeze is in effect?
More importantly, what about Gen 1 + 2 Stat Exp? At their peak, all Gen 1 and 2 Pokémon could invest full Stat Exp into every stat; so that means they're allowed 255 EVs in every stat.
And don't forget the Special Attack/Defence split - a lot of Pokémon lost out when Special was split into two stats. Now that they're back at peak efficiency, for example, Articuno gets a 30 point boost to special attack. What with Blizzard now having 90% accuracy and a 30% chance of permanently incapacitating whatever it hits (unless it happens to know one of the defrosting moves) that might make it actually viable!
Alakazam gets a 50 point Sp. Def boost, making it back into the special wall it was always meant to be. Omastar now has defences of 70/125/115 along with access to Shell Smash and Blizzard! Plus it has Shell Armour to protect it from always crit Pokémon like Focus Energy Jolteon.
And last but not least, Amnesia. Double Calm Mind! And Swoobat gets it. So, that's instant +4 Sp. Att/+4 Sp. Def with one move. Then it can start Stored Powering.