I'm not entirely sure specifically as there could be many different 'ash raichu fanfics'. Generally, it might be a fan - created story that involves the Pokémon Ash and Raichu. It could be about their adventures together, or perhaps a new take on their relationship within the Pokémon world.
To develop Alolan Raichu further, you could focus on its relationship with other Pokémon in Ash's team. Show how it interacts with them, whether it's sharing food, playing, or helping out during battles. Another way is to explore its unique abilities more. For example, its surfing skills. Maybe it can teach other Pokémon how to surf too. Also, you can give it a personality quirk like being really shy around new Pokémon but super brave in battles.
Well, there are several places to look for 'ash raichu fanfic'. Fan - made story aggregators are a great start. Besides FanFiction.net and Archive of Our Own, some Pokémon - focused forums might also have users sharing their own 'ash raichu fanfics'. You can also search on social media platforms by using relevant hashtags, but the content might be more scattered there.
Some Pokemon - focused forums might also have links or even sections dedicated to fanfiction. Members of these forums often share their own works or recommend good fanfictions they've read. For example, Serebii.net forums could be a place to check.
There are also fanfictions where Ash and Raichu have a special adventure together outside of the regular Pokemon journey. They could be exploring an ancient and mysterious place where Raichu's electric powers are needed to unlock secrets or solve puzzles.
One popular Ash Raichu fanfiction is 'Ash and Raichu's Adventure'. It tells a story about Ash and his Raichu exploring a new and mysterious region filled with unique Pokémon and challenges.
One plot idea could be Ash and his Alolan Raichu entering a local Pokémon surfing competition in Alola. They train together, with Raichu learning new moves to use on the waves. Another could be Raichu getting lost in a mysterious forest in Alola and Ash has to search for it, encountering new and rare Pokémon along the way. A third idea is that Ash's Alolan Raichu befriends a group of wild Pokémon and they have to work together to save their habitat from a natural disaster.
It could speed up his journey. With Raichu's greater power, Ash might be able to win battles more quickly and move on to more challenging regions or opponents.
It could be portrayed as a moment of great transformation. Ash might be hesitant at first, but realizes the potential of a Raichu. The evolution could be triggered by a very powerful opponent that makes Pikachu see the need to evolve. Then, as Raichu, it could start showing off new moves and a more confident attitude, which Ash would have to get used to.