Question

Is there?

Answer 1

You can not obtain a Deoxys in Pokemon B/W(though they may release an event for it someday), but you can change the forms with the meteors in the Nacrene Museum.

Note: The only way to get Deoxys in B/W is to transfer from Gen IV

Comments

Thanks

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And I think the only way to get it in Gen IV is migrating from Emerald. That event has long past. There may have been an event for it in Gen IV, but I can't recall there being one.