Yes, you can still get EV reducing berries in the Dream World. You can get the Aguav Berry,Grepa Berry,Hondew Berry,Kelpsy Berry,Pomeg Berry,Qualot Berry, and Tamato Berry
in Windswept Sky.
You need 2,500 DW points and 4 badges to get to Windswept Sky, you will see sparkling stars and when u click on the stars hopefully it will be one of those berries.
Hope this helps =P