The Yu-Gi-Oh! The animated series is one of the most beloved series, thanks to the entertaining gameplay it creates, the memorable characters, and the engaging storylines of all the seasons. While the main focus of all the chapters in the series is the card game, all the seasons have an overarching story that keeps the viewer engaged.
Due to the complex storyline and easy-to-understand focus on gameplay, Some details in the series have never been given a satisfactory ending or explanation.. These unresolved plots have become mysteries that Yu-Gi-Oh! fans have wondered about for decades. The series certainly has no shortage of mystery, from magical characters retrieving lost items to cards that have never been revealed.
10 Bakura Restores the Millennium Ring
A plot hole that is never explained
For most of the original Duel Monsters anime series, The Spirit Within the Millennium RingAlso known as one of the series' most powerful villains, King of Thieves Bakura, serves as the main antagonist. He was first introduced in the Kingdom of Fighters arc of the series, where he attempted multiple times to steal ancient artifacts from Yugi and Pegasus. During a mission to rescue Mokuba, Tristan was forced to fight against this spirit, an encounter in which he emerged victorious.
Joey's loyal friend took this opportunity to rid the world of this evil force by throwing the Millennium Ring into a forest. However, as season 2 begins, Bakura is once again seen wearing this cursed object, without any explanation given.. It is hinted that the item's spirit used ancient magic to return to its owner, but this is never explicitly stated in the chapter.
9 Years Old Officer Trudge
Possibly the only immortal character in the series
Tetsu Trudge is one of the most prominent supporting characters in Yu-Gi-Oh! 5Ds, a trusted and respected member of Neo Domino's Security Sector. Although the police officer is best known for his involvement in the anime's third season, he has appeared in the original series. He was first introduced as one of Yugi's bullies.the one Joey and Tristan must fight to protect their friend.
Trudge appears in 5Ds is most likely a descendant of the bully who tormented King of Games long ago. However, this has never been confirmed and Some official sources tend to equate police and bullies.. If that's the case, Tetsu must either be an older gentleman, since the chapter takes place decades after the original, or immortal.
8 Winners of the Duel Between Yugi and Jaden
A mystery that has kept fans intrigued for over a decade
In the final episodes of the anime Yu-Gi-Oh! GX, Jaden is sent back in time by an older Yugi.so that they can have one last symbolic duel to celebrate the students' graduation. The main purpose of this meeting is to remind the High King that dueling is supposed to be fun, a lesson he had long forgotten.
Through this duel, Jaden regained the spark he had lost after fighting for his life countless times in less than three years. After a grueling duel, Jaden was left with only his trusty Neos to fight against Yugi's legendary Egyptian God of Cards, Slifer. As soon as the protagonist declared his attack, the duel ended, never revealing whether he had a strategy to defeat the mighty god or if he had given up on winning the duel.
7 Abandoned Dormitories of Duel Academy
Negligence and lack of concern for students' lives
In the first season of Yu-Gi-Oh! GX, many characters were mentioned A tragedy occurs at the abandoned Obelisk Blue boys' dormitory.It is said that some students tried to use black magic to recreate the Games of Shadows that the ancient Egyptians used to play. This caused all those involved in these rituals to suddenly disappear without a trace.
Although several students had disappeared from the school grounds, not many adults showed any interest in the event. The heads of Duel Academy tried their best to keep information about the incident a secret, but never attempt to search for missing students. Without Jaden, the unfortunate souls captured by Nightshroud would probably never be saved.
6 Legendary Monsters of Roku
Is he an older version of Yugi?
Roku is one of Yuma's various mentors throughout his journey to become one of the best duelists in the galaxy. Although he may not appear to be very powerful, due to his age and small stature, he possesses a power that most players cannot overcome. Inside his temple, Roku keeps wooden statues of many of Yu-Gi-Oh!'s most iconic cards, from Dark Mage to Blue Eyes White Dragon.
Why Roku seems to be the only one with access to these mythical creatures has never been explained. Many fans have concluded that Yuma's mentor may be an older version of Yugitrying to teach the new generation as his grandfather had done. However, this issue has never been formally resolved and likely never will be.
5 Shadow Games Available in GX
A ritual that should no longer exist
After defeating Bakura and the embodiment of darkness, the ominous Zorc Necrophades, Pharaoh Atem used the power of Holactie to rid the world of the dangerous Shadow Games. This implied that the concept of these evil rituals should no longer exist in the world of the series. Regardless, the Yu-Gi-Oh! GX anime left out this important detail and once again uses Shadow Games in his story.
Since both series take place in the same universe, these games shouldn't even be mentioned in any ancient texts, as they were erased by Atem's time. This subject is never explained, and the Shadow Games are considered to be some kind of ancient and evil magic that has existed for centuries, although that's unlikely.
4 Yugi and Joey's Rematch
How did Joey beat the King of Games?
When the Battle City Tournament ended, Yugi and Joey had a friendly duel to give the latter a chance to reclaim the Red-Eyes Black Dragon. The two fighters agreed to meet soon on the streets of Domino City, in what promised to be an incredible showdown. Unfortunately, this encounter was never shown, leaving fans to wonder what happened during the fight.
THe showed signs that Joey was the winner in the duel.as he was later seen using his Red-Eyes in important duels. However, neither Yugi nor Wheeler ever spoke of this duel again, and no other characters seemed to know about it happening. It is a tragedy that this duel between two of the world's best duelists will never be witnessed by the fans.
3 Colorless Chaos Kings of the Dark World
A card will never be revealed
Season 3 of the GX anime, sees the heroes of the story trapped inside the Duel Monsters World, trying to find their way back home. Throughout their journey, they face many dangerous enemies, such as Brron, the evil king of the Dark World Army. The evil king's goal is to created the ultimate warrior, a being known simply as Colorless.
This monster can only be created by fusing 12 monsters, each of a different level. Before Brron could achieve his goal, Jaden defeated him in a fit of rage as the newly reborn Supreme King after supposedly watching his friends die, which was just another trick of the evil king. An official version of Colorless was released in 2024, although this version did not require the summoning of 12 monsters, implying that it was not the monster Brron attempted to summon in the anime.
2 Atem and Kaiba's Reunion
Will Kaiba achieve his goal?
The Dark Side of Dimensions movie serves as a loving tribute to the original Yu-Gi-Oh! Duel Monsters series, giving Yugi and his friends a fitting ending. The movie revolves around Kaiba's determination to bring Atem back from the spirit world and fight him one last time. By the end of the film, Seto has found a way to cross dimensions and meet his opponent in the afterlife.
The movie ended before fans could see what happened. between these two talented fighters, strongly hinting that they will have one last duel. Kaiba seems pleased with the outcome as he has returned to Earth and even helped Yugi develop a new game. However, it is never made clear whether he is pleased because he has finally defeated his opponent or simply because he has the chance to duel Atem one last time.
1 Continuation of Yu-Gi-Oh!
What does the Yu-Gi-Oh! timeline look like?
The first three series in the series have been officially confirmed to share a unique timeline, with each new iteration taking place several years after the previous one. When Yu-Gi-Oh! Zexal begins, The timeline of events becomes unclear.Unlike previous seasons, past events are not directly mentioned, making the show seem like it is taking place in an alternate universe.
However, up until VRAINS, each series contained a number of details and references that implied that they took place in the same timeline. Konami, the company that owns the rights to the series, has never made a statement regarding this and likely never will, as the anime series was rebooted with the release of Yu-Gi-Oh! Seven.
