>>55347585Alright I'll inform you.
EVs are "training points". You earn them by defeating (or catching in recent games) other Pokemon, and they're why the games say a caught Pokemon is stronger than a wild one.
You have 510 EVs in total to allocate between your various stats. Each stat can only accept 252 EVs before maxing out. At level 100 the EVs you have are divided by 4 and the result is directly added to that stat, that's the easiest to remember calculation.
Each Pokemon species has a certain amount of EVs that it awards upon being defeated (this is the part where Bulbapedia would be helpful). For instance, Caterpie awards 1 HP EV. Poochyena awards 1 Attack EV. Abra awards 1 Special Attack EV. And so on. Some Pokemon award 2 or 3 EVs, and some in multiple stats at once. If a Pokemon holds a Macho Brace, the amount of EVs it earns is doubled. If a Pokemon is infected by Pokerus (or has developed an immunity to it) the amount of EVs it earns is doubled. This stacks with the Macho Brace. Held "Power" items will increase the EV yield by 4x, but you need the right one for the right stat.
Vitamins (HP Up, Protein, Carbos, etc), award 10 EVs in a given stat, but if you're not playing SwSh or SV, Pokemon will stop accepting a vitamin type if they have 100+ EVs in that stat, forcing you to train the rest of the way. Wings/Feathers work similarly to vitamins, but add 1 EV each instead.
Starting in Emerald there are six berries that you can feed Pokemon to reduce their EVs and increase their friendship, if you want to free up and reallocate EVs in other stats:
Pomeg berries reduce HP.
Kelpsy berries reduce Attack.
Qualot berries reduce Defense.
Hondew berries reduce Special Attack.
Grepa berries reduce Special Defense.
Tamato berries reduce Speed.
Some games also have items for resetting all EVs completely back to 0, such as the Fresh-Start Mochi in SV. In generation 6 the Hyper Training minigame awards EVs without needing to use items or battle.
