Yu☆Gi☆Oh! The Dark Side of Dimensions Special: Eien no Rival - Yuugi to Kaiba!

Set six months after the events of the original Yu-Gi-Oh! manga, Yugi Muto and his friends are in their final year of high school and are talking about what they will do in the future. Meanwhile, Seto Kaiba has commissioned an excavation to retrieve the disassembled Millennium Puzzle from the ruins of the Millennium chamber. The item had previously housed the soul of his rival, Atem, whom he hopes to revive in order to settle their score. The excavation is interrupted by a mysterious man, who faces Kaiba in a game of Duel Monsters and steals two pieces of the recovered Puzzle. What is his ulterior motive? The stakes have never been higher; the rivalries never as fierce; the risks never so great.

A special episode of 'Yu-Gi-Oh! Duel Monsters' aired in between episodes 88 and 89. Mainly narrated by Anzu, the special recaps the major events of the Battle City tournament, beginning from the Pharaoh's meeting with Ishizu, and retelling several important duels including Yugi and Seto's tag duel, and Yugi's duels against Jonouchi and Bakura, up to Jonouchi's battle with Rishid on the Battle Ship. The special ends with Anzu wishing the series a happy new year.

A short special aired in the middle of information about Yu-Gi-Oh! with real people. Kotori takes Yuma to the gymnastics club at their school to cheer on her friend. There they meet the ace of the club, Kimura Taiki, who plans to quit after a recent loss at a competition. To cheer him up, Yuma challenges him to a duel.

While riding with Jack Atlas and Crow Hogan, Yusei Fudos's Stardust Dragon is captured by Paradox, a mysterious Turbo Duelist from the future, during a Turbo Duel and turned into a Sin Monster. With the help of the Crimson Dragon, Yusei chases after Paradox as he enters a time slip, ending up in the past. During this time, Paradox duels against Jaden Yuki, who is still able to use the powers of Yubel and The Supreme King. However, by this time Paradox had also captured Cyber End Dragon and Rainbow Dragon and overwhelms Jaden. He is saved thanks to Yusei and the Crimson Dragon. Jaden informs Yusei of Paradox's true intentions. By stealing various monsters from across time and turning them dark, he plans to kill Maximillion Pegasus, the creator of Duel Monsters, preventing the game from being created and causing the events of all three series to never happen. Yusei and Jaden agree to pursue Paradox, which leads them to the past and causes a meeting with the King of Games, Yugi Mutou. However, by the time Yusei & Jaden arrive, Paradox had already attacked his time, supposedly killing both Pegasus and Yugi's grandpa, and had also managed to steal Blue-Eyes White Dragon and Red-Eyes Black Dragon. After explaining everything to Yugi, he agrees to fight with Yusei and Jaden against Paradox in the ultimate three-on-one duel to free the trapped monsters and save both the world and time itself before it's too late.