it's on tv now.
They have already been released for both Pokemon Black and White and their sequels.
Pokemon black and white has been officially announced to be released on 3/6/11
Black and White haven't been released yet...
Pokemon Black and White has already been released world-wide.
no
Dissappointly there are no contests in Pokemon Black and White. They've been replaced by "pokemon musical". I know, it sucks... :P
It has not yet been announced when Keldeo will be available for download in Pokemon Black Version and Pokemon White Version.
This has been answered many times before. Anyway... Pokemon are different (e.g. main legendary), places are different (e.g. Black City / White Forest), and there are different battles.
no
It is an event pokemon, the event for which has not been run yet.
Pokemon black and white 2 don't have a confirmed date yet but it has been confirmed that it will come out sometime in spring.
It has been neither confirmed nor denied, though if you cannot then you can probably trade Pokemon over to HeartGold and SoulSilver to transfer onto it. There have been no announcements of the Pokewalker to be included with Pokemon Black and White. Since Pokemon Black and White feature new Pokemon, not obtainable in HeartGold or SoulSilver, then the chances of the Pokewalker being compatible with Pokemon Black and White is low. The only other solution is for Nintendo to make a new Pokewalker device to work along side Pokemon Black and White.