well you need to have either 2 ds's or follow the tutorial on the no$GBA to link the 2 and then trade it from there
You can't trade them from black and white to an earlier game, gotta be from an earlier game to black and white
The Pokeshifter building is on Route 16 iirc, only accessible if you have beaten the Elite 4. You need two DS systems, your flashcart and a legitimate 4th gen cart (D/P/Pt/HG/SS). You activate DS Download play on the DS with B/W in it and transfer pokemon from the DS with the 4th gen game in it.
how do you trade from pokemon black to pokemon black? i have 2 ds both with cyclods B.4 and pokemon black with the Rudolph's Child's Play patch V4 patch?? how do i trade ? or where do i go to trade? as i have tryed in the c gear but the DS dont seem to find each other