You can't actually trade Pokemon between Pokemon white and Pokemon platinum. The only way to get your Pokemon from Pokemon platinum to white is to use the pokeshifter.
The pokeshifter can be found in a lab to the west of white forest (or black city if you are playing Pokemon black). You can get to these places after you finish the main story. When transporting Pokemon using the pokeshifter the Pokemon can't know HM's and if they are holding items the items will be taken from your Pokemon on platinum and placed in your bag also, you have to transport 6 Pokemon at a time.
The scientist will tell you about the rules of transporting Pokemon when you get there anyway. Hope this helped!
You cannot trade, but you can use the relocator with two ds's and transfer Pokemon from platinum to white
You have to trade from platinum.
you can transfer Pokemon from Pokemon platinum to black and white but you can't trade from black to platinum
You can't, you only can transfer Pokemon Platinum Pokemon to Black and White. I repeat, YOU CAN'T.
No, but you can transfer from platinum to black or white using poketransfer of relocater.
Yes you can trade Pokemon from Pokemon platinum to Pokemon white. To do that you need to have completed the main story and gotten the national poke-dex; and then you need to go to route 15 and to the Pokemon trade/ link thing.
You have to trade it from platinum, diamond or pearl
You can never trade Pokemon from Black to Platinum, because Generation V Pokemon do not appear in Platinum or any other game before Black and White. However, you an transfer Pokemon from Platinum to Black after you beat the game.
you cant you have to get a celibi from game stop and trade it in to Pokemon black or white
After you finished the main story of the game, yes you can trade. A Pokemon transfer is on Route 15.
No you can't you have to beat the first gym then you can trade
You cannot find Heatran in Pokemon White. But if you have it in Diamond, Pearl, or Platinum you can simply trade it.