Well, for one, it's the exploration of his early life. Seeing how Yugi was before all the big dueling and adventures makes it interesting. For example, how he dealt with normal school life and simple friendships.
There is a fanfic named 'Baby Yugi and His Friends' that focuses on the relationships Yugi had as a child. It gives a lot of cute and heartwarming moments between Yugi and his closest pals. This fanfic really delves into the innocence of that time in Yugi's life. For example, it shows how they used to play games together and how Yugi's unique personality was starting to show even at a young age.
There's no evidence to suggest that Yugi Muto has actually 'abused' fanfiction. Fanfiction often exists in a realm of creative interpretation by fans, and Yugi Muto is a fictional character from Yu - Gi - Oh! Most likely, this is a baseless or misinterpreted claim.
Friendship is also a big theme. It could show how baby Yugi starts to form those early bonds with his future friends. For instance, in some fanfics, baby Yugi might meet Joey Wheeler when they're both really young and their first interactions are filled with childish innocence and the start of a great friendship. And family is important too. How his family influenced his growth and the unique family dynamics in the fanfic world of baby Yugi.
There's also 'The Dark Magician Girl's Secret'. This one focuses on the backstory of the Dark Magician Girl and how Yugi gets involved in uncovering it. It has a lot of mystery elements which make it really interesting. The relationship between Yugi and the Dark Magician Girl is portrayed in a very unique and heartwarming way.
A key element is the exploration of their unique relationship. Yugi Muto is more timid in nature while Yami is bold, and their fanfictions often play on how they interact and influence each other.
The creativity of the authors is really something. They can combine the Egyptian mythology aspects of Yugi's story with something like the high - tech world of a Gundam crossover. It allows for really wild and imaginative storylines that keep readers engaged.
One common theme is friendship turning into love. Yugi is often shown as a friend first and then the relationship deepens into something more romantic.
Yugi Muto's origin story is quite interesting. He was a shy and often bullied kid. He had a strong love for games, especially Duel Monsters. One day, he solved the Millennium Puzzle, which then housed the spirit of the Pharaoh within him. This changed his life as he started to gain confidence and duel against various opponents.
In Yugi Muto's origin story, the Millennium Puzzle is the central key element. It was through solving this that he got connected with the Pharaoh's spirit. Another key element is his life as an ordinary student before this encounter. His being bullied and his love for games set the stage for how the Millennium Puzzle would impact his life. And of course, the appearance of the Pharaoh's spirit within him which changed his whole personality and abilities in dueling.