Ok if you are looking for a hack or cheat list for the different costumes, 1. I would NOT provide you with that info since that is a violation of Square Enix's rules and 2. As far as I know there is no list like that to begin with.
I Googled your question and found only 1 site that my computer freaked out as I started to load the page. My security software threw up a STOP THIS IS AN UNSECURED SITE, WHICH MAY CAUSE DAMAGE TO YOUR COMPUTER IF YOU PROCEED.......so I didn't proceed since I rarly get such strong warnings from my software.
If you are talking about the registration codes that you receive when you purchase the soft ware and the have special gift items attached for making the purchase.....a list of those codes would do you no good, since they are good for a one time use.
All I can do is provide a link to the page that lists the different costumes, what item triggers them and there will be links that will tell you how that item is obtained. Skyfiredancer (talk) 18:50, July 29, 2015 (UTC)