I already know that the max EV points a pokemon gets is 510, and that the max for a stat is 252 so you get 252 for 2 stats and 6 on another.
Question is, how do I know if I maxed out a stat already?(Im using emerald by the way) so does the Ribbon girl give you a ribbon if you have 510 or if one of your stats as 255? How do I know when to EV train the other stat?