i have unkown EVs

You can't. You must start over, or erase the EV.
 
Erm...yeah, each of those berries reduces the EV value of one stat by 10:

Pomeg - HP
Kelpsy - Atk
Qualot - Def
Hondew - SAtk
Grepa - SDef
Tamato - Speed

So basically, just keep spamming each until the stat in question stops dropping.
 
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