Yu-Gi-Oh! Duel Monsters: Nightmare Troubadour is the first time that the Yu-Gi-Oh dueling card game has appeared on the Nintendo DS. You can build a deck out of more than 1000 cards, including three exclusive trading cards that come with each game. The bottom screen represents the card game area, utilizing full touch capabilities, and the upper levels displays characters as they battle in full 3D. Yu-Gi-Oh! Duel Monsters: Nightmare Troubadour also supports wireless play, letting you challenge your friends to a duel or trade cards wirelessly.