The plot could revolve around the discovery of Serena's pregnancy and how it changes their lives. Ash might start taking on fewer dangerous Pokémon battles to stay close to Serena. They could start preparing a nursery in a small cottage near a Pokémon forest. Serena could be worried about how her pregnancy will affect her Pokémon training skills in the future, but Ash is always there to reassure her. As the pregnancy progresses, they might face a crisis when a group of wild Pokémon threatens their home, but with the help of their Pokémon team, they manage to protect their unborn child's future home.
One possible plot could be that Ash and Serena decide to start a family after years of adventures together. They face the joys and challenges of pregnancy, like Serena having cravings for Pokémon - themed treats and Ash trying to learn all about how to take care of a pregnant partner. Their Pokémon friends also get involved, with Pikachu helping out in small ways around the house.
One plot idea could be that Ash and Serena discover they're pregnant during their journey. They then have to decide whether to continue traveling or find a safe place to settle for a while. Another could be that they face challenges from Pokémon battles while Serena is pregnant, and Ash has to be extra cautious to protect her and their unborn child.
One plot idea could be that they embark on a journey to find a special place to raise their child. They might face challenges along the way, like dealing with wild Pokémon that are more aggressive due to the new energy they sense. Another could be that they start a Pokémon training school for their unborn child and other kids in the region, teaching them about Pokémon care and battle strategies.
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.
In fanfiction, anything can happen. However, without specific details of the particular fanfic, it's hard to say for sure if Serena is pregnant. Some fanfictions might explore this plotline for the sake of drama or character development. It could add an interesting twist to the relationship between Ash, Serena and Lemon, but it also depends on the overall theme and direction the author wants to take the story.
One possible plot development could be that Ash and Serena have to deal with the new responsibilities of having a baby. This might cause some tension between them as they figure out how to balance their own goals and the needs of the family. Lemon could be involved as a support system, or perhaps as a source of conflict if there are romantic feelings involved among the three. For example, if Lemon has feelings for Ash, Serena's pregnancy could make those feelings more complicated.
Maybe in this fanfiction, Ash has been planning the proposal for a long time. He enlists the help of all their Pokémon friends. Pikachu holds the ring in its tiny paws. Ash takes Serena to a place that holds special memories for them, like the place where they first met. He then gives a heartfelt speech about their journey together and how he wants to continue it as her partner forever before popping the question.
One possible plot could be that Ash finally realizes his true feelings for Serena after all their adventures together. They might return to a special place from their journey, like the Kalos region. Ash would plan a simple yet heartfelt proposal, perhaps involving their Pokémon. Then the wedding could be a grand affair with all their friends from different regions coming together. Their Pokémon would also play a part, like Pikachu being the ring - bearer.
Well, it could be a story where they face the challenges of unexpected pregnancy together. Maybe they initially struggle with how their families and friends will react, and then gradually come to terms with their new situation and start preparing for the baby.
Well, it could start with Serena finding out she's pregnant and then telling Nate. They might face challenges like how to tell their families and friends, and also deal with their own fears and insecurities about becoming parents at a young age.
One idea could be that they reunite after a long time apart. Ash has become a more mature trainer and Serena has achieved her dreams too. They realize their feelings for each other have deepened. One passionate encounter leads to Serena getting pregnant. Then they have to deal with how their families and friends will react, and also how they will balance their future goals with raising a child.