>>30500660Whenever you KO a pokemon in the wild your pokemon gains a set amount of a hidden value called Effprt value, or EV.
Each pokemon contributes a set type and amount, like basculin gives +1 atk EV.
every 4 EV gained for a stat give +1 to that stat at level 100.
you max out at 508 EV points and no more than 252 per stat.
So it's basically a way to influence the stat growth of your pokemon by training
