A great Ash meets Dawn fanfic idea could be set in a post - apocalyptic Pokemon world. Ash and Dawn find each other in the chaos and have to rely on their Pokemon and each other to survive. They could also travel through time and meet their younger selves, which would lead to some really interesting character development. Maybe they are on a quest to find a legendary Pokemon that can restore the world to its former glory.
Well, an Ash meets Dawn fanfic could involve them meeting at a Pokemon breeding center. Dawn is there to study advanced breeding techniques and Ash is looking for a new Pokemon to add to his team. They start sharing their knowledge and experiences, and during their time together, they encounter a rare and endangered Pokemon species. They then decide to work together to protect and save this Pokemon, which in the process brings them closer together.
One interesting plot idea could be Ash and Dawn teaming up to explore a new, uncharted region in the Pokemon world. They could encounter rare and unique Pokemon species that are not known to the rest of the world. Another idea is that they participate in a special tournament where the rules are very different from the regular Pokemon battles, like battles on floating platforms or with certain type restrictions. A third plot could be that they discover a mystery related to an ancient Pokemon civilization and have to solve it to save the present - day Pokemon world from some kind of threat.
One idea could be that Ash and Dawn are paired up for a big school project. They start off not getting along but as they work together, they discover they have a lot in common and a friendship begins to form. Another could be a high school sports event where Ash is competing and Dawn is cheering him on, and that's when they first really notice each other. Maybe there could also be a school dance where Ash is too shy to ask Dawn to dance at first, but then finally gathers the courage.
Perhaps in the fanfiction, Ash and Dawn find a group of Pokémon that are being mistreated by a cruel trainer. They decide to rescue these Pokémon and in the process, they have to outwit the trainer and his goons. They also find a special Pokémon egg during this adventure. As they continue their journey, they take turns protecting the egg and learning more about the bond between a trainer and their Pokémon as they wait for the egg to hatch.
You could also create an alternate timeline for the 'a new dawn' story. Maybe in this new timeline, a key decision was made differently, and it completely changes the course of events. This would allow for a lot of creative freedom in exploring new relationships and plot developments.
I think Serena should be in an Ash meets Dawn fanfic. She has a special connection with Ash, and her presence could add an element of jealousy or confusion in the relationship between Ash and Dawn. Also, Cilan. His expertise in Pokemon types and his positive attitude could help Ash and Dawn in their adventures. And finally, Gary. His rivalry with Ash could be reignited in the context of the story, and Dawn could be caught in the middle of it all.
Some fanfictions might focus on a more emotional side of their relationship. For example, Dawn might be in trouble, and Ash has to go on a heroic journey to save her. Along the way, they both realize how much they mean to each other.
One idea could be a friendly competition between Dawn and Serena over who can help Ash catch the most rare Pokémon in a new region. They might set different strategies and use their unique skills to outdo each other while still remaining friends.
One idea could be that Ash and Dawn start a Pokemon training school together after getting married. They combine their knowledge and skills to teach new trainers. Another could be that they embark on a special journey to find a rare Pokemon as a sort of honeymoon adventure. And perhaps they have to deal with some old rivals who are a bit jealous of their relationship.
Perhaps a plot where Ash and Red meet in a mysterious Pokémon tournament. They start as rivals but gradually learn from each other and develop a mutual respect. Along the way, they discover secrets about the tournament's origin that could change the Pokémon world.
One idea could be that Ash and Mewtwo form an unexpected bond. Mewtwo, being so powerful, could initially be distrustful of Ash. But Ash's pure heart and determination slowly break through Mewtwo's defenses. They might go on a journey together to stop a new evil threat that is targeting Pokemon with strong psychic powers. Another plot could involve Mewtwo using its powers to help Ash understand some of the mysteries of the Pokemon world that he has been curious about for a long time.