Pokémon Ruby and Sapphire Versions/New Features/Stat Changes

The and  systems were refined in Ruby and Sapphire, the maximum IV a stat could have was boosted from 15 to 31, and a Pokémon's gender was no longer determined by the IV of its attack stat, which made it possible to have female Pokémon with maximum attack IVs, something that hadn't been possible before. The EV system is altered from the former stat experience system, with all Pokémon giving 1, 2, or 3 effort points in one or more of the six stats after their defeat in battle, with a cap of 255 per stat and 510 overall. A Pokémon with 510 EVs will be awarded with the if it is shown to a girl in Slateport City.