The ultimate beast of Pokemon White is Reshiram of Dragon and Fire. ? Reshiram is a white biped Poké mon with the characteristics of birds, dragons and mammals. A long fluffy mane grows from the upper end of its nose and mouth and extends along its head to its back.
The ultimate beasts of Pokemon Black are dragons and Zekrom. ? Zekrom is a kind of Poké mon standing on two feet. It has the characteristics of dragons and dinosaurs, and is black all over. It has red eyes, white iris and black pupils. It has a small trumpet-shaped protrusion at the tip of its nose, and a thundercloud-like crown on its head, with a bright blue end.
Extended data:
Reshiram uses the tail of a jet engine to fly at high speed, and the flame can burn everything. By burning its own tail, Reshiram can make the atmosphere move and change the world climate. Reshiram is the only Poké mon who can acquire blue inflammation and transverse flame skills.
Zekrom's tail can generate a powerful force, which can be used to launch attacks and create an anti-gravity field, which makes Zekrom almost unaffected by air resistance and gravity when flying. Can create multiple thunderstorms in one place at the same time, usually hiding in thunderstorm clouds. Zekrom is the only Poké mon who can learn cross lightning and lightning strike skills.
References:
Baidu Encyclopedia-Reshiram
Baidu Encyclopedia-Zekrom