Moltres, Articuno, Zapdos: Cannot be caught in wild.
Suicune, Entei, Raikou: Cannot be caught in wild.
Registeel, Regice, Regirock: Cannot be caught in wild.
Mesprit, Azelf, Uxie: Cannot be caught in wild.
Virizion: (After obtaining the National Dex) Go to Pinwheel Forest and head East. You'll see an entrance, that's where Virizion is at.
Cobalion: (After obtaining the National Dex) Go to Mistralton Cave and go to the deepest part of the cave. You should see an old man there and he'll tell you about the trio.
Terrakion: (After obtaining the National Dex) Go to Victory Road and there should be the only miniature cavern within the cave. There would be Terrakion.
to catch zapdos in pokemon black you have to have every legendary pokemon
You have to defeat the elite four then you can catch the legendary
Zekrom in Pokemon White and Resharim in Pokemon Black.
You catch them with a ultra ball
In Pokemon black you catch RESHIRAM and TORNADUS In Pokemon white you catch ZEKROM and THUNDERUS Sources : myself
you can catch as many legendary Pokemon but only once unless you have it on the computer
In black you can catch Reshiram and tornados. In white you can catch Zekrom and thunderos.
None
Yes, Reshiram is Black's legendary. You will not be able to catch Zekrom though.
I put a link to guide on all the legendary pokemon in Pokemon Black in the related links.
In Pokemon Black Version the legendary is Reshiram and Pokemon White its Zerkrom.The only way to get both is to transfer Zerkrom to Pokemon Black Version or Reshiram to Pokemon White Version.
Yes, you catch it in the Giant Chasm.