If you're talking about cheat codes then I don't know but if you want a card via password machine then you go into world championship then go to shop, then password machine then put in the 8 digit code for the card you wnat that is on the bottom left corner of the card you want, then it'll charge you for the card between 150 and 1000 DP for it.
you have to allready own the card or have 80% of the card pack collected
Use either the following website, or click on the "Related Link" below to find a complete list of Action Replay codes for the United States and the Japanese version of the game: http://www.konamiworldchampionship.com/apps/blog/show/2908849-ar-codes-for-yu-gi-oh-5d-s-reverse-of-arcadia-world-championship-2010
You can't.
Yusei and Crow
it allready did
Obelisk the tormentor is only available as a download.
no, you can't
Around the end of February.
Eiki can be found in at the entrance of Zeman the Ape King's castle.
it doesnt matter so just go on
Not within the game.
the lap top in the duel runner shop