This has nothing to do with the subject but..., people usually say "fuse/combine Black Kyurem and White Kyurem to get the original dragon". That is wrong. You would be fusing 1 Reshiram, 1 Zekrom and 2 different Kyurem. To hypothetically get the original dragon, it could be by fusing Reshiram AND Zekrom with Kyurem (all 3 at the same time); Black Kyurem with Reshiram; or White Kyurem with Zekrom. Fusing Black Kyurem with White Kyurem (2 Kyurems in the mix) would result in something different that I don't even imagine, maybe a negative counterpart to the Original Dragon or something...