Transfering it from a previous game is the only way you can legally obtain it.
you have to transfer from diamond, pearl, or platinum or trade with a friend
PokéTransfer or Dream World, none in Black. Or White. :|
No.you can oly get them if you transfer them from pokemon platnum,pearl,or dimond9the pokemon transfer building is around black city if you have pokemon black or white forest in pokemon white,
yes
You can transfer your Dialga, Palkia, and Giratina to your Pokemon black or white version game (NOTE: ONCE YOU HAVE DECIDED TO TRANSFER THE POKEMON TO THE POKEMON TRANSFER LAB IN POKEMON BLACK OR WHITE VERSION, THE POKEMON THAT YOU SENT ARE UNABLE TO RETURN TO YOUR PREVIOUS GAME) or you may just use cheat codes on your AR to find any Pokemon that you desire whether it is a shiny Darkri to an average Pikachu. Have fun!
Dialga in Diamond. Palkia in Pearl. Giritina in Platinum. Zekrom in White and Reshiram in Black.
you get zekrom in Pokemon white version and resheriham in Pokemon black.(in my oppinion, it should be the other way around, zekrom in Pokemon black, and resheriham in Pokemon white version) IT IS JUST LIKE PUTTING DIALGA IN POKEMON PEARL AND PALKIA IN POKEMON DIAMOND.
No you would how to use the poketransfer on route 15.
You cannot catch Palkia in Pokemon Black and White you much use Poke Transfer on Route 15
You can't
In black and white, if you ever get the legendary Pokemon Palkia, Dialga, and Giratina, you can give them the orbs, and they'll be stronger.
You canot a dialga egg in pokemon black and white.