Perhaps in the fanfiction, there's a threat to the Pokemon world. Ash and May team up to face it. During their adventure, they rely on each other, share their hopes and fears. This mutual understanding and support lead them to a realization of their love for one another. And in the end, they plan to get married to build a future together in the Pokemon world.
A possible fanfiction plot could be that Ash, Serena, and May are invited to a mysterious island full of unknown Pokemon. They have to work together to survive and discover the secrets of the island. Ash's leadership, Serena's ability to communicate with Pokemon, and May's quick decision - making skills would be crucial.
Fans create such fanfiction as a form of self - expression. They love the Pokemon franchise and want to explore different relationships within it. Ash and May are two characters with distinct personalities. Combining them in a marriage - themed story allows fans to delve into how their personalities would mesh in a romantic relationship, and also gives fans a chance to create their own version of a happy ending for the characters.
In the fanfiction, Ash and May could get married in a secret location, away from the public eye. They've had a long - standing relationship that they've kept private. The story could revolve around their journey to this secret location, with only their most trusted Pokemon by their side. Along the way, they reminisce about all their adventures together and how they fell in love. Once they reach the location, it's a simple yet intimate wedding with just a few close friends and their Pokemon.
A really interesting event could be a Pokemon - themed honeymoon. They could travel to a new, undiscovered region where they encounter never - before - seen Pokemon species. Another event could be when their Pokemon have baby Pokemon and they have to take care of them together, which would be a really cute and family - like scenario. Also, they might participate in a special Pokemon tournament as a married couple, facing off against other strong trainers.
In this fanfiction, Ash and May could be on separate adventures in Kalos at first. But then, they cross paths when they both get involved in a mystery related to a rare and powerful Pokémon in Kalos. They have to put their heads together, along with their Pokémon, to solve the mystery and protect the Pokémon from those who would use it for bad purposes.
In some fanfictions, Ash might develop a special bond with both Serena and May. For example, they could be exploring a new region together and encounter a rare Pokemon. Serena could use her knowledge of Pokemon behavior to track it, May could come up with a battle plan, and Ash would be the one to catch it. This kind of adventure would strengthen their friendship and show how well they work together.
It could be a rival trainer. Rival trainers are often very competitive in the Pokémon world. Maybe this rival is jealous of Ash and May's progress and decides to betray them to slow them down. They might spread false rumors about Ash and May, causing other trainers to be distrustful of them.
Definitely their Pokémon friends. Pikachu, of course, would be there. May's Blaziken and Ash's Greninja would also be among the guests. Their human friends like Brock, Misty, and Dawn would surely come. And perhaps some of the Gym Leaders they've met during their travels would also attend, like Roxanne from Rustboro City.
Love and companionship are very common themes. Since they are married, the stories often show how they support each other through different situations.