There's a possibility that she marries a Pokemon ranger. A ranger who has saved Jessie from a dangerous Pokemon situation. He shows her a different side of the Pokemon world, the side of protecting and co - existing with Pokemon. And when they get married, all the Pokemon in the ranger's protected area come to celebrate and offer their gifts, like rare berries or shiny stones.
The storyline might involve Jessie leaving Team Rocket to start a new life. She could meet someone who is not into the whole villainy thing. Their relationship could develop as they both discover a shared love for Pokemon in a different way than she did with Team Rocket. For the wedding, it could be in a beautiful meadow filled with wild Pokemon. Some of the Pokemon might even sing or create a beautiful display to celebrate the union.
Misty is a very likely candidate. She has been with Ash from the early days of his journey. They have a deep bond and have shared many adventures together. Their relationship has always had a bit of a romantic undertone, so in a fanfiction, it would make perfect sense for them to get married.
One possible storyline could be that Jessie and James, after years of being Team Rocket members, decide to leave that life behind. They realize their love for each other while on a Pokemon adventure. In the fanfiction, they might start a new life in a peaceful Pokemon - filled region, perhaps opening a Pokemon - themed cafe. Their Pokemon would also be part of their new life, with Meowth helping out in the cafe.
He could marry an original character created specifically for the fanfiction. This character could be a powerful mage from a far - off place who crosses paths with Natsu during one of his adventures.
Well, in some fanfictions, the plot could revolve around their family. They might decide to have a family of their own, and the story could focus on how they raise their children in the Pokemon world. This could include teaching their kids about Pokemon, dealing with the kids' Pokemon adventures, and also protecting their family from any threats that might come their way because of their past associations. It could also be about them traveling the world together as a married couple, exploring new regions and discovering new Pokemon species while strengthening their relationship along the way.
He could marry Mikasa from Attack on Titan. Just think about it. Naruto's positive and determined personality would contrast with Mikasa's more stoic and protective nature. They could meet through some sort of interdimensional accident. Naruto would be fascinated by the Titans and the world outside his own, and Mikasa might be intrigued by Naruto's ninja abilities.
He could marry Hinata. Even though he's banished, Hinata might follow him because of her deep love for him. Their relationship could develop further outside the village, and they could get married and start a family.
He could marry Hinata. They have a pre - existing relationship in the original series. Hinata has always had feelings for Naruto, so it would be a natural choice. In the fanfiction, their relationship could progress more quickly, leading to an early marriage.
Well, Harry could marry one of the veelas. Given their beauty and allure, it would add an interesting dynamic to the story. Their relationship could involve Harry having to deal with the jealousy of other wizards and also the cultural differences of the veelas. Or he could marry a descendant of one of the founders of Hogwarts. This would tie in a lot of Hogwarts history into their relationship, and their wedding could be a grand event that unites different factions within the wizarding community who have ties to the founders.
Meowth would probably be overjoyed. He has been with Jessie and James for a long time and would see their marriage as a great thing. He might be more helpful than ever, running errands for them and even trying to cook for them using his little paws. Their other Pokemon like Ekans and Koffing might be a bit confused at first but would soon get used to the new situation and be protective of their new 'family'.