When a new game shop opens in town, it threatens to put Grandfather Mutou out of business, and even worse, the owners want to put Yugi and his grandfather completely out of the picture when the owner's son, Ryuji Otagi, challenges Yugi to a dragons and monsters game he must play without Yu-gi-oh's help.
In the final round before the fight with Pegasus, Yugi faces Mai Kujaku and her harpies' pet dragon, while Jonouchi fights "Bandit" Keith Howard, America's most unscrupulous gamer, whose deck is loaded with six-guns and slot machines.
Yugi and Jonouchi fight to escape the subterranean maze of the Meikyu Brothers, and then Yugi must face Kaiba, the vengeful former game master, in their third Duel Monsters battle atop Pegasus Castle.
Maximillion Pegasus, the super-rich American who designed the Duel Monsters game, forces Yugi to compete in a tournament on Duelist Kingdom; however, Yugi's grandfather's fate is at stake and Yugi hopes to win against the power of the Millenium Eye.
Yugi battles Bakura in the pharaoh's empty tomb for Yu-Gi-Oh's forgotten Egyptian name, while massive earthquakes threaten the World of Memories and unleash the undead armies of Zorc Necrophades.
Yugi faces stronger opponents in even stranger games. Monster Fight takes on a whole new meaning when Yugi put his soul in the figure. Then, a classmate challenges him to Dragon Cards, a magical card game.
Yu-Gi-Oh fights the original Dark Magician, Mahado, in a three-thousand-year-old battle, unaware if changing the past will change the present; meanwhile, Yugi, Anzu, Jonouchi, and Honda battle an enemy who has been with them all along.
