Kyurem from Best Pokemon

Kyurem (Japanese: キュレム Kyurem) is a dual-type Dragon/Ice Legendary Pokémon introduced in Generation V. While it is not known to evolve into or from any Pokémon, it has two other Formes, which are activated by using the DNA Splicers on it and either Reshiram or Zekrom, resulting in a process called Absofusion that removes Reshiram or Zekrom from the party until the fusion is undone. It will then become White Kyurem (with Reshiram) or Black Kyurem (with Zekrom). However, it is impossible to own a White Kyurem and a Black Kyurem at the same time legitimately, as the game rejects the second fusion of Kyurem with Reshiram/Zekrom, and Kyurem cannot be traded or placed in Pokemon Bank while fused. Along with Reshiram and Zekrom, Kyurem is a member of the Tao trio, which exists in the legends of the Unova region. As both Black Kyurem and White Kyurem, it is the game mascot of Pokémon Black 2 and White 2, respectively.