A possible plot idea is that there is a mermaid - themed Pokemon tournament. Misty enters it, thinking it's just a regular competition. But as she progresses, she realizes that the real purpose of the tournament is to find a human worthy of a special mermaid - related power. Misty has to compete against other trainers, all while uncovering the mystery behind the tournament and the power it offers.
One idea could be a Pokemon that has the ability to transform into a mermaid and it goes on a journey to find its true origin. It could face challenges like being hunted by humans who want to study its unique form.
Well, perhaps in the fanfiction, Misty gets hypnotized by an ancient Pokémon's power. This causes her to have visions of a forgotten era and she starts to communicate with Pokémon in a different way. Her friends are worried at first but then realize this might be a chance for Misty to learn something new about Pokémon. Or, she could be hypnotized by a spell gone wrong in a magic - themed Pokémon tournament, and she has to compete while under the spell, which gives her an unexpected edge in the battles.
One interesting plot idea could be Ash and Misty getting lost in a mysterious new region that has unique Pokemon. They have to work together to survive and find their way out, all while discovering new Pokemon species and their behaviors. Another could be a story where they participate in a high - stakes Pokemon tournament together, facing off against tough opponents and strengthening their bond as friends and partners in the process. And perhaps a plot where Misty discovers a rare and powerful water - type Pokemon and Ash helps her train it, leading to a deeper understanding of each other's goals and dreams.
One idea could be that the OC is a new trainer who arrives in Misty's town. They have a unique type of Pokemon that Misty has never seen before, and she becomes intrigued. As they interact, they go on adventures together, facing challenges that test their skills and friendship, like dealing with a group of wild, powerful Pokemon that are causing trouble in the area.
One plot idea could be Ash and Misty getting separated from their group in Sinnoh and having to rely on each other to survive in a strange, new area. They could encounter a rare and powerful Pokemon that neither of them has seen before. Another idea is that they discover an ancient mystery in Sinnoh related to a type of Pokemon evolution that was thought to be lost. This could lead them on a journey to uncover the truth and help a particular Pokemon evolve in a new way.
One idea could be that Bonnie discovers a hidden mermaid colony while on a Pokemon adventure near the sea. The mermaids initially mistake her Pokemon for threats but then realize they mean no harm. Bonnie then has to help the mermaids protect their home from a group of poachers who are after rare sea Pokemon that live near the mermaid colony.
A plot could revolve around a Pokemon contest that is only for water - type Pokemon. Misty, being a water - type expert, helps May train her Pokemon for this special contest. Along the way, they face challenges and learn more about each other's training styles.
One idea could be that Misty catches a rare but contagious Pokemon illness while on a journey. Her friends, like Ash and Brock, have to find a special herb or Pokemon with healing abilities to cure her. Another plot could be that Misty gets sick from overexerting herself in a tough battle, and she has to rely on her Pokemon's care and the support of her friends to recover. Maybe she also has a flashback to her past training days while sick and realizes how far she's come.
One idea could be exploring Ariel's life after she becomes human. Maybe she has trouble adjusting to some of the more mundane aspects of human life, like cooking or doing laundry. Another could be a story where Ursula's sister comes to seek revenge, but Ariel has to convince her that not all humans are bad.
One idea could be exploring the relationship between Melody and a new mermaid friend from a different part of the ocean. They could go on adventures together and discover hidden treasures.