I'm sorry, I haven't read that specific fanfiction, so I can't summarize it directly. But generally, it might involve Ash and Lyra being betrayed in some way within the context of the Pokémon world, perhaps by friends or allies in their adventures.
Another possibility is that it could be an old acquaintance who has changed for the worse. They might have been jealous of Ash and Lyra's success or popularity in the Pokémon world. This person could use their knowledge of Ash and Lyra's habits and weaknesses to betray them. It could also be a group of people rather than just an individual, like a team of thieves or poachers who see Ash and Lyra as obstacles to their illegal activities.
Their closest friends like Brock and Misty would surely be affected. They've been through so much with Ash, and his betrayal would be a huge shock. And for Lyra, her friends in her own region might be deeply hurt.
Well, it could be about Ash and Lyra making a deal with some evil organization that goes against their friends. Maybe for some powerful pokemon or a chance to achieve a great goal they've been wrongly led to believe is right.
One common theme is friendship. Since Ash and Lyra are from the Pokemon universe, their relationship often starts as friends and then may develop into something more. They support each other during pokemon battles and in exploring new areas.
Professor Oak would be an excellent addition. He could provide valuable advice to Ash and Lyra, maybe even send them on a special mission. Also, Dawn could be included. She could be a friend who joins them on their adventure for a while, bringing her own unique Pokemon and skills to the story.
One possible analysis could be that in such a fanfiction, the idea of Ash being betrayed might be a way to create drama. It could involve his friends or companions in the harem turning against him for various reasons like jealousy or misinformation.
There are fanfictions where Ash and Lyra team up to compete in a special Pokemon tournament. In these stories, they train together, learn new strategies, and face off against tough opponents. Some fanfictions also explore a romantic relationship between them, showing how their different personalities complement each other while they travel across the Pokemon world.
Ash might be heartbroken at first. He'd feel a deep sense of loneliness and confusion.
It's hard to say it's extremely popular across the whole Pokemon fanfiction community. There are many different themes in Pokemon fanfiction. While the idea of Ash being betrayed in the Orre region could attract some readers who are interested in exploring darker or more complex storylines within the Pokemon world. But compared to more common themes like Ash's journey to become a Pokemon master with his regular team, it might not be as widespread.
Well, in this kind of fanfiction, the idea of Ash being betrayed in the context of having a Mew as a mate is quite an interesting concept. It might involve a plot where Ash's friends or some other characters turn against him because of his relationship with Mew. Maybe they see it as something abnormal or dangerous.