Maybe Tracey. He was also an acquaintance of Ash. Since Tracey has his own unique skills and knowledge about Pokemon, his presence could bring new elements to the story. He could help Ash and other friends with things like Pokemon research or understanding some rare Pokemon behaviors.
One possible reason could be jealousy. Maybe Ash has achieved more in his Pokemon journey than his friends, and they can't handle it. Another reason might be some misunderstanding. For example, an enemy could trick Ash's friends into thinking Ash has done something bad. Or perhaps there's some sort of power struggle. If there's a powerful item or a rare Pokemon involved, and Ash is the main contender, his friends might be tempted to betray him for their own gain.
He could make friends with Dawn. She's a well - known character in Sinnoh and her knowledge of Pokémon contests could be really helpful to Ash. Another potential friend could be Barry. His energetic and competitive nature would make for some interesting interactions with Ash.
Ash would probably be devastated. He would feel like his world has been turned upside down. At first, he might not believe it and think it's all a big mistake. As the reality sinks in, he could start to isolate himself from others, even from his Pokemon for a while. However, his strong will would eventually kick in. He would use this as motivation to become stronger, not just in his Pokemon battles but also in his ability to face challenges alone, without relying on his so - called friends.
The fanfiction might also explore Ash's inner turmoil. He could struggle with self - doubt, thinking that he was not a good enough friend. However, as he faces various challenges on his own, he realizes his own worth and that the abandonment was more about his friends' own issues rather than his shortcomings.
Their friends like Brock would probably be very excited. Brock, being knowledgeable about Pokémon and also having a nurturing side, would offer all kinds of advice on taking care of May during the pregnancy. He might even cook special meals for her to ensure she has all the nutrients she needs.
Some of their Pokémon friends might also show unique reactions. Pikachu could be very protective of Serena, always staying close by to make sure she's okay. And their other Pokémon might bring little gifts like berries or shiny stones they find, as if they understand what's going on. The more mischievous Pokémon might play little pranks that end up being endearing in the context of the pregnancy, like stealing Serena's hat and then replacing it with a flower crown as a sign of celebration.
In most Pokemon fanfictions, this is not the case. Ash is typically portrayed as a character who values his friends deeply. Fanfictions usually build on the strong bonds he has with his friends in the original series. However, there might be some very rare and out - of - the - ordinary fanfictions that take a different approach, but it goes against the general essence of the Pokemon story.