well,there was a victini giveaway.victini is a rare pokemon which you can only get through Nintendo wfc[wi-fi connection].i do not know if that is still going.otherwise check the other gift services on the main menu.if there are no gifts,wait and keep an eye on pokemon gift sites.hope i helped!
You can get the Japanese Pokemon Black & White in some shops in Japan, or you can pre-order Pokemon Black & White on a site called Play Asia.
yes there are some
I have Pokemon Black, and as far as i know you cannot catch event legendarys without an event (eg. Genocect, Zorua). You cannot catch some Pokemon on the game, but Pokemon White can, and White can't catch some Pokemon that you can catch on Pokemon White. Lol!
There are no codes
Because they are rare
I know there are others, but here are some examples: Pokemon Black-Gothita, Vullaby, Cottonee, and their families Pokemon White-Solosis, Rufflet, Petilil, and their families
some show up in white forest
there are not very many pokemon black and white action replay codes.
you cant find Genosect in Pokemon black or white Genosect will be obtainable in a Pokemon event some time in the future
Have the Pokemon types you will need most in the place you are going.
Milotic, Empoleon or Vaporeon.
Some might