Translations:EV training/2/en
From Pixelmon Wiki
Basics
All Pokémon, when defeated in battle, yield a species-specific spread and amount of EVs that is given to all Pokémon that participated in defeating the fainted opponent or are holding an Exp. Share. Unlike with experience, the full amount of EVs are given to every applicable Pokémon rather than being split evenly. These EVs are added to a possible total of 510 EVs a single Pokémon can gain, with a limit of 252 for each stat. They are applied to the Pokemon's stats immediately, without the need to level up. EVs will gradually contribute more stat points as the Pokémon's level gets higher, up to a maximum ratio of 4 EVs to 1 stat point at level 100.