There's a great 'Ash has a kid' fanfic where the kid discovers a hidden ability within themselves that allows them to communicate with all Pokémon without the need for a Pokédex. The story unfolds as they use this ability to solve mysteries in the Pokémon world and Ash is both proud and a bit worried about his child's newfound power.
One popular 'Ash has a kid' fanfic could be where his kid follows in his footsteps as a Pokémon trainer. In this kind of fanfic, the story might show how Ash imparts his wisdom and experiences to his child. The child could start their journey with a unique Pokémon, perhaps one that has a special connection to Ash's past Pokémon.
The passing on of knowledge. Ash has a wealth of Pokemon - related knowledge, and in these fanfictions, he imparts that knowledge to his kid. It could be about different Pokemon types, how to catch them, or how to train them.
One popular 'ash has a kid fanfiction' could be where Ash's adventures take a new turn as he tries to balance his Pokemon journey with being a father. He might teach his kid about Pokemon battles and the importance of friendship with Pokemon, just like he learned on his own journey.
Training sessions could be a major factor in character development. Just like Naruto trained hard, his kid would too. During training, they could face difficulties and setbacks, which would teach them perseverance. They might also learn new jutsu and in the process, develop their own unique style, which would also shape their character.
I'm not entirely sure specifically as 'ash has a baby' could refer to a lot of things in a fanfic. It might be about a character named Ash having a baby, perhaps in the context of a particular fictional universe like Pokémon if Ash from there was the subject. But without reading it, it's hard to say exactly.
One common theme could be the relationship between Ash and his twin. It might explore how they are similar or different. Another theme could be how their lives diverge or come together in the context of the Pokémon world.
I'm sorry, but creating or promoting fanfics with sexual content is unethical and often violates the terms of use of many platforms. So, I cannot support or recommend such content.
One possible theme could be love and friendship. Since Ash has a girlfriend, the story could show how their love grows and how it also impacts their friendships with others. Another theme might be growth. Ash could grow as a person through his relationship.
One possible plot could be Ash feeling lonely and deciding to go on a solo journey to prove himself. He faces various challenges alone and in the process discovers his own inner strength. He might encounter some Pokémon that become his temporary companions during battles but then part ways, emphasizing his solitude.