Yes, but obviously White/Black PKMN can't go to Platinum. But the other way around, yes. (Only if you have beaten the Pokemon League and you have gotten the National Dex.)
No
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.