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sry i haven't been on much either. i just got ur message. I still want the gible but i have to go somewhere right now. i will probably be on later today around 1 or 2 pm (on the eastern side of the US, idk what time that would be for you)
Each berry takes care of a respective stat. Once the EV's for said stat are gone, it'll tell you that the berry has no effect.
Using berries (these) is also a good way to get a Pokemon's happiness level way up.
Just wanted to say that Metalkid is the easier/best way to check IV's....course, you'll have to know the EV's.
HOWEVER, you can use EV reducing berries (berries from Pomeg to Tomato) and that'll clear up any/all EV's.