All the other pokemon trainers who look up to Ash and Lyra could be affected. Ash has been an inspiration to many young trainers. His betrayal might make them question their own beliefs and values. And Lyra's friends and those who trust her would also be in dismay.
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.
Gary Oak is a likely character. He has always been a rival to Ash and in fanfiction, he might betray Ash out of jealousy or a desire to be the ultimate Pokémon trainer. Another could be Misty. Maybe she gets influenced by some external force or her own insecurities and turns against Ash. Brock could also be a candidate in some stories. If he falls in love with a girl who has a vendetta against Ash, he might be forced to choose between his loyalty to Ash and his new love interest.
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.
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.
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.
Gary could be a likely character. He has always been Ash's rival and there could be a plot where his jealousy or some other motive leads him to betray Ash. Another could be one of his so - called friends from the Pokemon League who might be influenced by power or some dark secret. Or, in some really dark fanfictions, it could be a Pokemon that Ash trusted deeply but for some reason turns on him.
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.
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.
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.
Some fanfictions might have Misty betray Ash. Perhaps she gets lured by the promise of power or some valuable reward. She could be tricked into believing that Ash is no longer the friend she thought he was and that betraying him is for the greater good.
A common theme is the exploration of their individual personalities. Fanfictions may show how Ash's impulsiveness and Lyra's more cautious nature interact. Teamwork is another important theme. They combine their skills to overcome difficulties. And sometimes, there's a theme of discovery, like finding rare Pokémon or uncovering secrets about the Pokémon world.