you catch him at the very end of the mistralion cave (tip:get him paralized teach a Pokemon false swipe and then use false swipe and get him down to one health and then the your pokeball and vuala) you might want flash also wich you get at castelia city in the ally second to the last on the left side.
you can not catch graveler on Pokemon white Sorry:):):):)
You cannot catch Hydreigon on Pokemon White.
You can't catch celebi in pokemon white.
You can not catch Braviary. You have to catch Rufflet in Pokemon White and evolve it.
No, you cannot catch Darkrai in Pokemon White.
In Pokemon black you catch RESHIRAM and TORNADUS In Pokemon white you catch ZEKROM and THUNDERUS Sources : myself
No, it is exclusive to Pokemon White. Where you would catch Rufflet in White, you catch Vullaby in Black.
You cannot catch Reshiram in Pokemon White, because it's exclusive to Pokemon Black.
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!
You can't catch it in Black, but you can catch it in White. In the White Forest.
You can catch magby in the white forest
You can catch Silcoon in White Forest.