How do you get legendary Pokemon in the black version?

Answer 1

you find reshiram when it comes out from the light stone in N's castle, you find Cobalion, one of the legendary trio in mistraltion cave after you get Zekrom/Reshriam in the game. you can find the grass/fighting trio pokemon in pinwheel forest after you get Cobalion. The rock/fighting trio is in Victory road but the rock will block your path until you get the other two in the Trio. Follow the heavy rain to find Tornadus.

Answer 2

beat the elite four than go through the team plasma castle and meat N there than the little orb you have will pop out and the legendary Pokemon Zekrom or Reisharm will pop out the white version lets u get zekrom and the black version lets u get reisharm so chose the gam carefully zekroms moves are fusion blast zen headbut dragonbreath and slash

Answer 3

after beating all gym leaders, you go through Victory Road. At the end, first you battle the Elite Four and get to Adler, the champion, but instead of battling him, team plasma castle rises and at the top Reshiram appears out of the light stone you have from the Nacrene City and you have to catch it with a master ball.

Answer 4

You get Zekrom/Reshiram (depending on version of the game) in N's Castle. AFTER you beat the Pokemon league.