Question

Black Kyurem
White Kyurem
Thundurus (Incarnate)
Tornadus (Incarnate)
Landorus (Incarnate)

Comments

How are we supposed to know?

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oops, I meant the other form for the cloud trio.

Answer 1

We obviously don't know for sure yet. My guess is no because of the fact that Black and White Kyurem won't have a Pokedex entry. Also, the Incarnate Forms can be caught in the regular B/W.

Answer 2

No, you will not be able to trade the forms to Black/White 1, as they are not in the game data (we would ave known about the forms a years ago if they were).

It's possible that the Pokemon can be traded back to B/W but they will revert to their regular forms from B/W.

Comments

actually there was some place holder data for Black & white Kyurem in the original Black & White Versions... just saying