It could be that the producers of 24 Oras 2023 had a different vision or casting choices that didn't include Mang Tani. Sometimes these decisions are based on various factors that aren't made public.
Brendan and May in ORAS fanfics are great for exploring different storylines. For example, they could be part of a story where they have to team up to save the Hoenn region from a new threat. The fanfic might focus on how their different personalities, Brendan's more scientific approach and May's intuitive nature, work together to overcome challenges.
In ORAS (Omega Ruby and Alpha Sapphire), Team Magma could be considered a great team for the story. Their goal of expanding the landmass gives a clear and interesting narrative. They are driven by their leader, Maxie, who believes in their cause wholeheartedly, which makes for an engaging story arc as you oppose or side with them throughout the game.
Yes, there are quite a few good Archie ORAS fanfics out there. You can start by looking on popular fanfic platforms like Fanfiction.net or Archive of Our Own. Just search for 'archie oras' and you'll find a variety of stories ranging from adventure - based ones where Archie's character plays a central role in the ORAS (Omega Ruby and Alpha Sapphire) storylines, to more character - study type fanfics that explore his motives and relationships within the Pokemon universe.
Ruby and sapphire are quite different in the ORAS manga. Their appearances, abilities, and the way they interact with other characters all set them apart.
The theme of her past and her origin also pops up often. Writers like to explore where she came from and how her past experiences have shaped her into the character she is in the Fate series. This can add a lot of depth to the story and make the readers understand her character better.
Well, of course, Raikou is a main character. Naruto is also likely to be a main character in many Naruto Raikou fanfictions as he is the central figure in the original series. Sakura might also be involved as she is one of Naruto's closest friends. Kakashi could be there too, as he is an important mentor figure.
A team that has a clear and unique goal is a key factor. For example, Team Magma wants to expand the landmass. This gives a distinct direction to the story. If a team has a strong leader like Maxie in Team Magma, it helps. A good leader can drive the actions of the team and make the story more engaging. Also, a team that can cause significant changes in the game world, like Team Magma's actions affecting the environment, is important for being the best for the story.