Reshiram is a DragonFire-typeLegendaryPokémon introduced in Generation V. Along with Zekrom and Kyurem, it is a member of the Tao trio of Unova. Reshiram is also known as the 'Vast White Pokémon'.
Reshiram does not evolve from or to any other pokemon.
How to Obtain
With a Fire-type Pokémon (doesn't have to be pure) and Kyurem in your party, enter the Mausoleum and search in any patches of grass. You must have at least 8 badges to go to the Mausoleum Of Origin.However, to catch Kyurem you need the Champion Badge. Reshiram can also be obtained through Trade and Pokémon Roulette.