supercheats.com thats where i looked. It doesnt tell u everything but it helps

ussualy at the begining at the DS game list you can see a cheat button, it will let you
too get all god cards, infinit LP, all duel disk and costume and you can use forbidden or
limited cards !!!!!!! my cousin can do this, im so jealous!!!!!!!!!!!!!!!!!!!!!! >_<

use an ar code.

well there is only 2 sultions
1: get action reply and select all! cards ( duh u will have everything including cards
that u canot get in packs
2: get it from a friend

use the cheat button at the start of the game.