There is different codes that you can only use once
You can buy Card Jitsu cards from CP online store, or you can buy it from Toys R Us. You can get a golden card which immediately takes you to the next belt. However, if you're a black belt you will...
go to the toy store, buy cards, go to unlock items, type the code, and now you have cards. But which website?
yes
you have to unlock them by going to toys R us and buy them and program them into your PC .