If I trade White Kyurem over to my Black 2, would I be able to unfuse them ( I have the Splicers) and get 2 Pokemon? Or, because it is a trade would they be stuck together?
You can't trade White Kyurem to Black 2. Otherwise, if you hack, they would be able to be split. But it's not legitmatrly possible to trade either Kyurem B or W to other games.