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If you access the Dream World with White 2 using an account started with White, will you be able to access the same Dream Home and all the Berries and other items you had?
If you mean "Are more pokemon going to have their Dream World abilities available?" then yes. And Sneasel is already available with its DW ability of Pickpocket via the Pokemon Dream World (in the Icy Cave - your best bet is to tuck in a pure Ice-Type)