A good starter team for fanfiction should have a Pokemon with high speed, like Eevee. It can evolve into different types depending on your needs. Also, a defensive type like Geodude is essential. It can resist a lot of physical attacks. And don't forget about a special attacker. Squirtle is a great option as it can become Blastoise and has strong water - type special attacks.
The Litten line (Incineroar) is a great starter for the Ultra Moon story. Incineroar is a strong Fire - Dark type. It has high attack power and can learn some really useful moves as it levels up. It can hold its own in many battles and is quite intimidating to opponents.
Well, 'Konosuba: God's Blessing on This Wonderful World!' is a really good starter light novel. It's a hilarious isekai story with a bunch of misfit characters that constantly get into comical situations. Also, 'Re:Zero − Starting Life in Another World' is popular among beginners. It has a complex yet fascinating story about a boy who can reset time after his death in a different world.
They might have adventures where Naruto's brotherly instincts lead the way. Maybe they go on a mission to protect a village that has a special meaning to Naruto as a 'brother' figure to Team 7. He would be extra determined to keep it safe.
If Ash had a powerful starter, the anime would likely be more action - intense from the start. His battles would be quicker and more decisive, as his starter could overpower many opponents easily. This might also lead to different story arcs, as stronger opponents would need to be introduced earlier to keep the challenge level up.
I think Grookey is a great starter for the Pokemon Sword story. It has a strong start in terms of its attacks and evolves into a very powerful final form. It can easily handle the early - game battles which are important for progressing through the story.
It depends on your playstyle. Some might say Charmander because of its potential evolution into a powerful Charizard. But others prefer Squirtle for its good defense and later Blastoise's abilities.
One great example could be a fan fiction about the Straw Hat Pirates from 'One Piece'. It might explore their adventures in new and creative ways, like facing a powerful new enemy not in the original story. Another could be a story centered around the Survey Corps from 'Attack on Titan', delving deeper into their relationships and struggles.