Yes
Having your Pokemon eat these berries will reduce their EVs by ten points in a certain stat. Each of these berries will decrease a different stat.
Pomeg Berry - Lowers HP by 10
Kelpsy Berry -Lowers Attack by 10
Qualot Berry - Lowers Defense by 10
Tamoto Berry - Lowers Speed by 10
Hondew Berry - Lowers Special Attack by 10
Grepa Berry - Lowers Special Defense by 10
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