Konami World Championship

Yu-Gi-Oh! World Championship Tournament 2004, known in Japan as Yu-Gi-Oh! Duel Monsters 9: Expert 3, is a video game based on the Yu-Gi-Oh! franchise.

The game has been released on the Game Boy Advance. In the game, the player can assemble three decks and can play Duel Monsters against a variety of computer opponents. The game features the first 1,108 cards released in Japan. There are 29 opponents in the game. Each opponent has different skills and decks revolve around a certain theme (Yugi Muto = Basic, Rare Hunter = Exodia, Yami Yugi = Ultimate, etc.).

The stronger opposing decks (Level Four and above) use three copies of the Forbidden/Limited/Semi-Limited cards. Also, the opponent can switch Flip Effect Monsters into Defense Position the turn they are Flip Summoned if no other cards in play prevent it.