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.
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.
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.
One aspect that makes 'Dark Yami x Yugi' fanfiction interesting is the potential for character growth. Yugi can learn from Dark Yami's more assertive and strategic nature, while Dark Yami can be softened by Yugi's compassion. Also, their connection through the Millennium Puzzle adds an element of mystery. Fanfiction often delves into the backstory of this connection, creating stories that are full of intrigue and discovery.
A popular 'Dark Yami x Yugi' fanfiction is 'Dueling Souls United'. In this fic, the author really plays up the idea of their souls being intertwined through their dueling experiences. It's a great read for those who like to see how their partnership evolves. Then there's 'Yugi's Encounter with Dark Yami's Past', which takes a unique approach by exploring Yami's past and how Yugi comes to terms with it. It adds a lot of depth to their relationship. And 'The Dark and the Light' is also a good one. It shows the contrast between Dark Yami and Yugi, and how they complement each other in unexpected ways.
Dark Magician Girl could develop by becoming more independent. Maybe at first, she is always following Yami Yugi's lead in duels and in battles against evil. But as the story progresses, she starts to make her own decisions and use her powers in new and unexpected ways, showing that she is more than just a sidekick.
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.
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.
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.
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.