A possible plot could be that both Silver and Tikal are called by a powerful, mysterious force. They find each other on this journey. Tikal's connection to the Chaos Emeralds and Silver's psychic powers interact in unexpected ways. As they face various challenges together, they grow closer. Silver is initially a bit of a loner, but Tikal's warm nature melts his heart, and they end up falling in love.
A possible plot is that Tikal and Chaos meet in a dream realm first. In this realm, they gradually understand each other's true natures. As they keep meeting in this way, they start to form an unlikely bond. When they finally meet in the real world, they are already friends and work together to restore balance to the chaos emeralds' energy.
One idea could be Silver coming from the future to prevent a new threat in the Sonic X universe that the others are unaware of. He might team up with Sonic and his friends in unexpected ways, like using his psychic powers to help them access hidden areas. For example, he could use his powers to levitate Sonic over a large chasm that the others can't cross.
Perhaps the reader is a gamer who somehow gets sucked into the game world where Lost Silver exists. They have to navigate the strange and often dangerous game environment while also getting closer to Lost Silver. Or, the reader could be a psychic who senses Lost Silver's presence and tries to help him move on from his tragic past, leading to a deep and emotional connection between them.
One idea could be that Silver and Shadow are forced to team up to stop a new, powerful enemy that threatens their world. They start off distrusting each other but as they face challenges together, they begin to understand and respect one another.
One idea could be that Silver and Blaze are in a dangerous situation, like facing a powerful enemy. In the heat of the moment, they share a kiss as a sign of their unspoken bond and new - found courage. It could be a moment of realization for both of them about their deeper feelings.
Perhaps a plot where a group of trainers team up to explore the uncharted areas of MT Silver. Along the way, they face challenges not only from wild Pokemon but also from an evil organization trying to take over the region. They have to use their combined skills and the bond with their Pokemon to save MT Silver.
You could also focus on a relationship that was only hinted at in the original. Maybe two characters who had a brief encounter but in the fanfiction, you develop their relationship further, showing their journey from acquaintances to something more, like a deep friendship or even a romantic relationship.
One idea could be creating a story where the main character is a new trainer in the 'pokemon silver and blue' world and has to overcome a unique challenge, like a strange new pokemon species that is causing chaos. Another could be a story about a trainer who gets lost in an unexplored area of the game's map and discovers hidden pokemon with extraordinary powers.
One idea could be to explore what happens after the end of the movie. Maybe Pat and Tiffany start a new hobby together, like painting. They could discover new things about each other through this shared activity.
One idea could be that Lyra and Silver team up to discover a new type of Pokemon that has unique powers. They might have to face off against an evil team who also wants to control these Pokemon.