you can catch Zekrom, Victini, Thundurus, Landorus, and Kyurem
Once, you have caught one, it's the same as any other Pokemon. Yes.
Tornadus cannot be caught in Pokemon white. He can only be caught in Pokemon Black, in the same way Thundurus is caught in Pokemon White.
There is no legendary Pokemon in Undella Bay.
I am not sure because i caught him the first try, but probably not so save before him and stick up.
If he does, he will be selfish and he will have no compassion.
there is no "white" legendary in pokemon white. its black ( and called zecrom) and in the top floor of N's castle and then after u VS N
Zekrom.
White Kyurem
It's not possible, legendary Pokemon cant be bred.
Uxie is indeed a rare Pokemon appearing only once in the games it can be caught in. Uxie is part of a classification of Pokemon called Legendary Pokemon. Legendary Pokemon are the rarest Pokemon and can only be caught once per game they appear in.
it is 1 of the 3 legendary birds from Kanto and is not on Pokemon black or white ALTHOUGH if you caught it on any older game you could transfer it using poketransfer after you defeat N.
on pokemon black version u get the legendary pokemon reshiram!(sry if its spelt wrong) and in white u get zekrom! u get the legendary after u defet the pokemon ledge.