Obviously, Yugi and Yami are the most popular. They are the main characters and their relationship is central to the story. Writers often like to explore their bond further, whether it's in a more emotional or action - packed way.
Kaiba is also a very popular character to focus on in fanfiction related to this. His rivalry with Yugi and his own journey in the Dark Side of Dimensions can be really interesting to write about. He has his own motives and goals that can add a lot of depth to a fanfiction. You could write about how he uses his resources and intelligence to deal with the challenges in that dimension.
Pegasus is another character that can be great to focus on. His connection to the Millennium Items and his knowledge of the Dark Side of Dimensions could be explored. Maybe a fanfiction where he has a hidden agenda in the Dark Side of Dimensions and Yugi and Yami have to figure out what it is. His unique abilities and personality make him a fascinating character to write about in this context.
One idea could be exploring an alternate ending where Yugi and Yami have to face a new threat in the Dark Side of Dimensions that was hidden all along. Another could be a story about their friendship growing even deeper during an adventure in that dimension. Maybe a fanfiction where they meet new characters who have unique powers and they have to team up with them to save both worlds.
Yugi is always an interesting character to focus on. After the events of 'Dark Side of Dimensions', he has a new level of maturity and experience. His relationship with the spirit of Atem has also changed, so exploring his thoughts and feelings about that would be great. Another interesting character could be Seto Kaiba. He's always been a complex character, and in the post - movie world, his drive for power and his rivalry with Yugi could take on new dimensions. And don't forget about the new characters introduced in the movie. They have a lot of potential for development in fanfiction.
One popular trope is the 'power transfer' where Yami Yugi imparts some of his ancient powers or knowledge to Yugi in a fanfic. Another is the 'alternate universe' trope, like a modern-day setting where they are regular high - school students instead of duelists. And the 'bond - strengthening' trope is also common, showing how their relationship deepens through various challenges.
One underrated character is Shadi. He has a mysterious past and his abilities could be explored more in fanfiction. You could write about his connection to the spirit world and how it might affect the events in the Dark Side of Dimensions. Maybe he has some hidden powers or knowledge that could change the course of the story.
One idea could be a story where Dark Yami and Yugi have to team up to face a new, powerful enemy that neither could defeat alone. They start to understand each other's strengths and weaknesses better during their battles.
One popular character paired with Yami Yugi is Tea Gardner. In fanfiction, they often have a deep connection that goes beyond friendship. Their shared experiences in the world of Duel Monsters can form the basis of a romantic relationship.
There are likely other characters like his friends who support him during the duels. They may not be as powerful as Yami Yugi in dueling but contribute in other ways, such as providing moral support or helping him find rare cards.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms have a large collection of fan - made stories, and you can simply search for 'dark yami yugi fanfiction' in their search bars.
There are also 'dark yami yugi fanfiction' that deal with his relationships in a different light. Instead of being the hero and protector, he could be a more complex figure in his interactions with his friends. For instance, a story might show him being jealous of his other self, Yugi, and how this jealousy affects their relationship and the events around them.
Well, clearly Yugi and Yami are the main characters. In their baby forms, they are the focus of the fanfiction.