Yu-Gi-Oh! Dark Duel Stories is a game that was released for the Game Boy Color in 2000. The game has the player duel certain members of the Yu-Gi-Oh! cartoon series. Defeating them in a duel has them give you a card from the official card game and a "card part" than can be used in the construction of unique cards, a feature that is only supported by this game. The player can duel or trade cards with other players through the Game Boy Link Cable. The player can also use the password feature that lets the player input passwords that appear in the real-life versions of cards. Doing so would give the player the in-game version of the real-life card. One caveat is that each card has a cost: the card cost has to be lower than the player's Duelist Level before being able to be played, while the t