I'm an older player and my younger brothers are getting into the game. I was wondering what sets legal to use, and if the old sets(basic fossil) are compatable with the new sets?
In Modified tournaments, like Psychic Pokemon Master said, it's everything past EX Deoxys. However, in a Pokemon League, if you have on in you're area, all sets are usable (Except for a couple obscure, goofy promos, but most promos are legal).