How do you EV train Pokemon?

Question

What brings up the EVs and what brings them down?

Answer 1

(Shakes head) Denno, Denno, Denno..you should know this.
Battle wild Pokemon to gain EVs, and/or use Vitamins/Wings. Use Berrys that "lower the __ stat, but increases happiness" to lower the EVs.
Pokemon give off EVs give off different amounts with the species, but Vitamins and Wings will always increase the stat by 1 EV. EV reducing Berrys will reduce it by 1.

Comments

Whoopsies. I was wrong about the Berrys.

If you have over 100 EVs in a stat, the first berry will reduce them to 100, while further berries will decrease the EVs by 10. Therefore if you want to remove all EVs you will need 11 berries for the stat.-Pokemon DB EV Section quote

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isnt it in black and white where its a fixed amount of 10 EVS reduced for berries?