If you're looking for YuIgHo cards, here are a few possible places to buy them online:
Pokeorder carries a wide variety of YuIgHo Single Cards, Booster Packs, and Theme Decks.
CrossToy has a more modest collection available, but offers YuIgHo booster boxes for sale, which are much cheaper than buying the boosters individually.
Or, check eBay for YuIgHo:
YuIgHo Video/DVD
Amazon is a good place to find YuIgHo videos and DVDs or even books and computer games:
