I am not sure if they will make Poke' Walkers for Black and White but, if they do they most likely the games won't be able to connect with HeartGold and SoulSilver Poke' Walkers.
No. Pokewalkers, so far, are only compatible with HG/SS
No.
Sadly, they do not. However, there is the Global Link/Dream World now to cover for it!
YES
Pokemon Black and White are not compatible for trading with any of the other previous games.
No, Pokemon Black and White are compatible with all versions of Nintendo's DS line.
it probably wont because pokemon br is in the sinnoh region
yes.though of course you cannot trade or battle with Pokemon from the Unova Region as they are new, and Pokemon Pearl will not recognize them.
In Our New Smashing Sequel to Pokemon Black and White.We Did Allow It To Be Able To Trade Pokemon Black/White 2 With Pokemon Black/White.But Gamers Must Make It To A Certain Part In Game Play. GAMEFREAK
Pokemon White is not compatible with SoulSilver.
Yes its compatible with anything from the d.s all the way to the new 3ds i know because i have both
Yes you can but you can't trade from black to pearl or white to diamond because the games are not compatible with each other because the Pokemon in black and white will come up as ? in the pokedex's of the other games. But you just can't trade to pearl from black or white sorry. However you can trade between black and white using infrared connection. (the other games don't have infrared that's why the game cancels the trade between pearl and black or diamond to black).