Each berry (reduces a stat by 10 points with each use)
HP = Pomeg Berry
Attack = Kelpsy Berry
Defense = Qualot Berry
Special Attack = Hondew Berry
Special Defense = Grepa Berry
Speed = Tamato Berry
As for the Reset bags - here's a tip
Scroll over to super training and then delete all the bags. Leave the ds somewhere (on still) and still on the same page of super training for about 30 minutes. Once you've come back later you'll have a full slot of 12 bags and possibly a few reset bags.
Apologies for my grammer in sentencing.