if I send Pokemon dream radar legendaries to bank, will the be able to receive them agian on black/white 2? this will be very usefull for getting better dream radar legendaries, because then you only have to reset dream radar without reseting black/white 2, because If you are at the end of white 2 the dream radar legends get better, i've heard.
To get another legendary force of nature (or another any legendary, for that matter) you have to restart the whole game, by deleting it and its save, then redownloading it from e-shop.
Source
Hope I helped!