What is DNA Splicers?
History of DNA Splicers
DNA Splicers can be used on Kyurem to fuse it with Reshiram or Zekrom into White Kyurem or Black Kyurem or to separate White Kyurem or Black Kyurem into its constituent Pokémon. The DNA Splicers can only fuse together one Kyurem and Reshiram or Zekrom at a time. In order to fuse a Kyurem with a different Reshiram or Zekrom, any existing fusion must be undone.