The transfer lab on route 15 allows you to permenantly transfer pokemon from HG, SS, Diamond, Pearl, and Platinum, much like the pal park. It requires 2 DSes as ninja said. On one DS you go to the transfer lab and start the process with the man in a labcoat. On the other DS, you use the download software settings and select the 6 pokemon you want transfered. They cannot know HMs and held items will not go through. Then a minigame plays in which you capture the pokemon. They appear in your PC box. You cannot move a pokemon from a GBA game directly onto Black/white. You need to use pal park on another ds game and then use the transfer lab.