trading cards. Here's how to tell if any of them have gained in value. Read more: 20 Tough Money Truths We Wish We Knew In Our 20s The first metric in determining the value of Yu-Gi-Oh!

Oh! but he could take a page from the Pokemon playbook in terms of how losing more often could have served him.

Most follow a similar formula of beating duelists in battle to unlock new areas and cards. The first game in the series was released before the official Yu-Gi-Oh! card game, so its rules are based ...

What Is Yu-Gi-Oh ... new generation of duelists at the prestigious Duel Academy—a highly competitive boarding school where pencils and books have been replaced by Duel Disks and monster cards!