Perhaps they reunite in a forest where there's a rare Pokémon sighting. They both remember their adventures together and how they used to face challenges. They might start reminiscing about the times they got lost in similar forests before. Then, they could join forces to catch the rare Pokémon. Ash would use his battle skills, and Dawn would use her knowledge of Pokémon behavior to come up with a plan.
The plot could revolve around Ash and Dawn being chosen to represent their home regions in a big Paldean Pokemon tournament. They train hard together, learning new techniques from Paldean trainers. However, they soon discover that there is a conspiracy to rig the tournament, and they have to expose the plot while still competing.
Well, in this fanfiction, perhaps Dawn has achieved a great milestone in her Pokémon training, but she realizes that without Ash's influence and friendship, it wouldn't have been the same. So, she decides to confess to Ash how much he means to her, not just as a friend but in a more special way. Ash, on the other hand, may need some time to process this new aspect of their relationship.
It could also have an emotional impact on the Pokémon. Some of the Pokémon might have felt lonely without their old friends. When they reunite, they would feel a warm sense of belonging again. This could improve their overall well - being and performance. The Pokémon might even start behaving more playfully and be more energetic, as they are now in a more positive and familiar environment with their friends.
Perhaps in the fanfiction, Ash and Dawn reunite after a long time apart. They realize their feelings for each other have deepened and soon find out they are going to have a baby. Their friends from their Pokémon journeys come to support them. The story could focus on how they balance their new family life with their existing Pokémon-related goals. For example, they might teach their baby about different Pokémon types from a very young age.
In a 'pokemon ash and dawn wedding fanfiction', it could be that Dawn has always had a secret crush on Ash. One day, Ash accidentally discovers this and realizes he feels the same way. They start planning their wedding, inviting all their Pokemon trainer friends. During the wedding preparations, they also have some cute moments with their Pokemon, like training them for a special performance at the wedding.
One possible plot could be that Ash and Dawn explore Unova together, facing new Pokemon and trainers. They might encounter a rare Pokemon that is causing trouble in the region and work together to solve the problem.
They might have an epic battle against a common enemy together. Greninja could show off some new moves it has learned during their separation, and Ash could use his experience from other adventures to lead them to victory.
One possible plot could be that Ash finally realizes his true feelings for Dawn after years of traveling together. They return to a place special to them, like Twinleaf Town. Their friends gather to celebrate their union. Ash might give Dawn a special Pokémon as a wedding gift, perhaps a Pikachu - themed item for her to remember their adventures with Pikachu.
One possible plot could be that Ash and Dawn decide to host a Christmas party for all their Pokemon friends in the forest. They gather all kinds of berries and treats for the Pokemon. Ash uses his Pikachu to light up the Christmas tree they made out of twigs and vines. Dawn decorates it with beautiful ribbons she found. All the Pokemon play games and exchange little gifts made from natural materials like shiny stones or leaves. It's a celebration of friendship and the holiday spirit among the Pokemon community.
Their reunion could be filled with a rush of old memories. Maybe Ash would show Misty all the new Pokémon he's caught. And Misty would tell Ash about her adventures back at the gym. They might even decide to travel together again for a while.