Have the Pokemon types you will need most in the place you are going.
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
leftovers life orb (in some occasions) quick claw any accuracy+1 item choice specs (only for certain strategies)
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
Milotic, Empoleon or Vaporeon.
Some day (*+*)