Bulbasaur is also a possibility. It's a classic starter Pokemon and has a good balance of offensive and defensive capabilities. With its grass - type moves, it can be useful in many situations. Plus, it could grow into a powerful Venusaur as the daughter progresses in her Pokemon training.
Pikachu could be a great choice as it has been Ash's iconic Pokemon. It would create a strong connection between the daughter and her father's journey. Another option could be a Eevee. Eevee has the potential to evolve into different types, which would offer a lot of possibilities for her journey and battles.
Another possibility is a Torchic. Torchic is a fire - type, and it's small and cute but can grow into a very strong Combusken and then Blaziken. It would bring a lot of energy to Fem Ash's team and could be a great partner for her in the early stages of her Pokemon journey, especially when facing off against grass - type Pokemon.
In a Pokemon fanfiction with Ash and Mewtwo, it could start with Ash encountering Mewtwo in an unexpected place. Maybe in a hidden forest where Mewtwo is observing the wild Pokemon. Ash, being his curious self, tries to approach Mewtwo. Mewtwo, initially hostile, realizes Ash's pure intentions and they start an unlikely friendship. This could lead to many adventures where Ash and Mewtwo face various challenges together, like battling against a new, powerful and evil Pokemon organization.
In fanfiction, the relationship between Ash, Ho - Oh, and his starter can be very creative. Ash's starter might be a rare or unique one that has a connection to Ho - Oh's legend. Ho - Oh could see Ash's pure heart through his relationship with his starter and choose to guide them on their journey. This could lead to Ash uncovering secrets about the Pokemon world that are related to Ho - Oh and the starters' origins.
It could be a Pikachu. Since Pikachu is often associated with Ash and could be considered a special kind of 'first' pokemon for him in a different take of the story.
Perhaps an ancient evil spirit that was sealed away long ago. The hatching of the legendary starter's egg is a sign that the spirit can break free. It wants to possess the starter to regain its full power and take over the Pokemon world. This would make for a very dark and menacing antagonist, and Ash would have to use all his skills and the power of his friendship to defeat it.
Obviously, Ash is one of the main characters. He is the trainer who gets the legendary starter. And of course, the legendary starter itself is also a main character. It has its own personality and abilities that play a big role in the story.
One possible plot could be that Ash finds a Riolu as his starter pokemon. Riolu is initially very shy and distrustful of Ash. But as they go on adventures together, Riolu starts to open up. They face challenges like battling against Team Rocket who tries to steal Riolu for its potential power. Ash has to train Riolu not just in battle skills but also in trusting him completely. This journey of building trust and growing stronger together could be a great fanfiction plot.
Well, in the fanfic, Ash might take Snivy to a special training ground where Snivy discovers new ways to use its vines for both attack and defense. This could lead to Snivy evolving faster than normal. And as they travel, they meet other trainers with different starters, and there could be friendly competitions that further strengthen the bond between Ash and Snivy.
In Pokemon fanfiction, the idea of Ash and Dawn having a daughter can lead to many interesting storylines. It could involve their daughter inheriting their love for Pokemon battles. Maybe she'd start her own journey, with Pikachu or one of Dawn's Pokemon as her partner.
One possible fanfic could be about Ash starting his journey with Snivy. Maybe it focuses on their initial struggles to understand each other. Ash, being used to more energetic starters, might find Snivy's calm and sometimes aloof nature a bit difficult to deal with at first. But as they face various Pokemon battles together, they gradually build a strong bond.