I am sorry to say, but any pokemon black or white pokemon cannot be found or traded in any way to any of the other games. This is because the games such as pokemon diamond, pearl and platinum have different game data and were created before the new pokemon like reshiram and zekrom were. So the game data cannot load the brand-new pokemon into them. I am sorry.
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No you can't. You can catch zekrom in Pokemon white and reshiram in Pokemon black.
Zekrom and Reshiram are Genderless, as are most legendary Pokemon.
Unless you cheat, you can only obtain Reshiram in Pokemon black. You will need to trade to Pokemon black if you have white for zekrom to be in Pokemon black.
When you reach N's castle, Zekrom will confront you after Reshiram has appeared.
Yes, you can get Zekrom from "N's Castle" and in black you get Reshiram instead.