How do you trade Pokemon from Pokemon White to Pokemon Alpha Sapphire?

Answer 1

You will need to purchase the Pokemon Bank from the eShop and download the transfer that came with it. When you load up the transfer, make sure you have all the Pokemon you want to transfer to the Pokemon Bank in Box 1. Any items that the Pokemon were holding will go back in the bag and they cannot go back to Pokemon White. (It's the same rule to Black, Black 2, and White 2) Once the transfer is over, disconnect from the transfer and load up Pokemon Bank with Alpha Sapphire inserted.

If you have not used it yet, it will introduce you to the tutorial and how to use the Pokemon Bank. When you start it up, switch to the Transfer Box, which should be on the left of Box 1. Drag the Pokemon out of the box and put it in another box in the Pokemon Bank for later or you can put them in one of your PC boxes to use now. Make sure to save by pressing X and select save and quit. Let the server save the changes, then it will disconnect from the internet. The Pokemon you got from Pokemon White should be in Pokemon Alpha Sapphire now. To check them, just boot up the game and check your PC like normal.

Answer 2

On the title screen, press these buttons simultaneously: Up, B, and X. It should pop up a screen asking you to delete the file, then confirm it.