Ups Defense gain, but lowers Speed.
Power Belt is for Defense EV training. When your Pokémon defeats an opponent while holding this item, all party members that gain EVs (including Exp. Share holders) receive an extra +8 Defense EVs.
Pair with wild Pokémon that give Defense EVs (like Geodude) for maximum efficiency. **Important:** The bonus only applies if the holder defeats the opponent—switching loses the bonus.
Game:Polished Crystal