There are 26 legendary Pokemon in Pokemon black/white version.
All of them, if you trade with other games.
You use the transfer machine next to White Forest. (I have Black so for me it is next to Black City.)
Zekrom = Dragon/Electric Reshiram = Dragon/Fire
You can catch Rayquaza in your house upstairs after you catch all the legendarys in the game.
look frist its its tornadus u get in black and seconed thundorus is one white's legendarys. if u really want get thudorus in black u trade with a freind that has white ;) thanks 4 raeding my answer bye bye
You can catch the main white legendary, Kyrugem, Virizion, Cobalion, Terrakion, Thunderous, Victini, Zorua, Zoroark, Volcarona, and Landorus.
I have Pokemon Black, and as far as i know you cannot catch event legendarys without an event (eg. Genocect, Zorua). You cannot catch some Pokemon on the game, but Pokemon White can, and White can't catch some Pokemon that you can catch on Pokemon White. Lol!
Victini does NOT evolve in Pokemon Black or White.
you have to have all the legendarys
Reshiram, Zekrom, Victini, kyurem, Terrakion, Cobalion, Virizon
get all the legendarys