Yu-Gi-Oh! World Championship Tournament 2004, known in Japan as Yu-Gi-Oh! Duel Monsters Expert 3 (遊戯王デュエルモンスターズ エキスパート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 1,138 cards released in Japan (201 spells, 109 traps, 55 fusion monsters, 16 ritual monsters, 224 effect monsters and 533 normal monsters). It is noteworthy that you can collect "Dark Magician" and "Polymerization" in two different artworks, counting as different cards.