i got a Kyurem in a GTS trade in Pokemon B2, so I could have both Black and White Kyurem. I tried to use DNA splicers on the new Kyurem with a Reshiram but nothing happened. Do the splicers just not work on Kyurems from BW1, or do they just only work on Pokemon who have never been traded?
It only works with your own in-game Kyurem.
Source: I've tried to get both in the same game already. Unsuccessful.