There could be. The Pokemon fandom is quite large and diverse. Fanfic writers love to create unique storylines for their favorite characters. Ash and Serena are popular characters, so it's not surprising that someone might write a fanfic about them having a family. But these types of fanfics may not be endorsed by the official Pokemon creators.
In the fanfic, the reaction in the Pokemon world would be mixed. The local Pokemon townspeople might hold different views. Some would see it as a beautiful thing, a new start for Ash and Serena. Others might worry about how it will impact their Pokemon training. The Pokemon gym leaders could also have different reactions. Some might offer their gyms as a safe place for Serena to stay during her pregnancy, while others might be more hesitant, fearing it could set a precedent that might disrupt the normal flow of the Pokemon training world.
Obviously, Ash and Serena are the main characters. Ash has been on countless Pokemon adventures, and Serena has been by his side in many of them. In this particular fanfiction scenario, they are at the center of the story because of Serena's pregnancy, which will likely change their lives and their approach to Pokemon training forever.
One great fanfic could be 'The Journey of Ash and Serena' which focuses on their adventures together. It has a lot of sweet moments between them and shows how they grow both as trainers and as friends.
Well, perhaps in the fanfiction, they discover Serena's pregnancy during an important Pokemon battle tournament. This news spreads among their friends and fellow trainers. Some are overjoyed and offer support, while others are a bit skeptical about how they'll manage both family and their Pokemon - related duties. They then have to figure out how to balance their passion for Pokemon with the new responsibilities of parenthood.
Overcoming obstacles. There could be various obstacles like financial concerns (in the context of the Pokémon world), or dealing with enemies who might see the baby as a threat. The fanfic may show how Ash and Serena work together to overcome these challenges and ensure a safe and happy future for their family.
One possible plot could be Serena discovers she's pregnant during her Pokemon journey. This could bring about a lot of changes in her goals and how she interacts with her Pokemon. Maybe she has to take a break from her usual adventures to take care of herself and the upcoming baby, and her Pokemon become more protective of her.
Fanfics are a great way for the Pokemon fandom to engage more deeply. For Serena and Ash fanfics specifically, they can attract fans who are really interested in their relationship. Writers can create stories that show different sides of their personalities, which can make the characters even more relatable. It also encourages creativity among fans, as they come up with new ideas for adventures, Pokemon, and character development. This all adds to the overall richness of the Pokemon fandom.
One reason could be that she might be worried about Ash getting into dangerous battles. She cares deeply for him and the thought of him getting hurt scares her.
Definitely their close friends like Brock and Misty. They would be there to support Ash. And all of Serena's friends from Kalos too. Also, the Gym Leaders they've met along their journey might be invited. And of course, their Pokemon. Pikachu would be right there by Ash's side, and Serena's Fennekin would also be present.