>>38914796Depends on what's added and what isn't.
Take PokeMMO for example. No legendaries, and usually they pick changes made across the generations to make things more balanced (No permaweather despite being gen5). What resulted was a metagame where due to lack of Zapdos Togekiss of all things proceeded to take a massive shit on everything and has constant talks about getting banned.
No matter the availability, every Pokemon gen will have around 3 Pokemon dominating everything with some cockblock mons trying to keep them from going out of control.
