Unfortunately, Reshiram cannot evolve like legendaries in all generations of games e.g. Zapdos or Mewtwo never evolve. Although odd hacks could be produced, officially there are no evolutions for Reshiram.
Pokemon Wiki Answers Team
reshiram does not evolve
Unfortunately, Reshiram is a legendary Pokemon, therefore it does not evolve.
Nothing - Reshiram doesn't evolve. Also, Reshiram is only in the Unova region (Black and White 1 and 2) so why is this question in Diamond, Pearl and Platinum?
catch reshiram or zekrom and beat the Pokemon league twice then go to opelucid city and talk to the gym leader then trade reshiram evolve pinco.
you have to evolve him or get a legendary pokemon but its not zekrom,reshiram or thundurus and the others
delibird, siviper, dialga, heatran, palkia,reshiram, zekrom, giratina,darkrai and much more.
dito evolves into reshiram
You don't find Reshiram in Pokemon White. You can only get Reshiram in Black.
No, Ash does not capture Reshiram.
No. Reshiram is a Black only Pokemon.
No, you cannot make a Reshiram Egg.
no ditto and reshiram both do not have genders