Is there anyway of getting 2 master balls in Pokemon white?

There are two ways of getting master balls within Pokemon White. One way is to get your Pokemon White save file from Pokemon Black or Black 2 and then you will be able to pick up a Master Ball from the woman's house left of castelia city gym if you already picked up the Master Ball previously given when talking to her in your original Pokemon game. The other way to obtain a Master Ball is to pick it up from relic castle by talking to the scientist on the upper-right floor.