There might be a fanfic where Jessie and James get stranded on an island. This would force them to rely on each other in new ways, and perhaps develop deeper feelings for one another as they struggle to survive and find a way back home.
You can start by looking on fanfiction.net. It has a large collection of Pokémon - related fanfics, including many about Jessie and James. Just use the search function and type in 'Jessie x James' to find relevant stories.
Well, Jessie and James' love story is a rather interesting one. They are part of Team Rocket, constantly scheming. But beneath all that, there's a connection. They've been through so much together, from getting blasted off by Pikachu countless times to coming up with new plans to capture Pokémon. Their love might not be the typical romantic love at first sight. It's more like a love that has grown out of mutual understanding, loyalty, and the shared experiences of being in Team Rocket.
They might love fanfiction because it offers new perspectives on their own lives. In fanfictions, their characters can be developed in ways that the original show might not have explored fully. For instance, they could be portrayed as more complex individuals with deeper backstories.
I'm not sure specifically as there could be many different versions of such a fanfiction. But generally, it might be about Ash coming to the rescue of Jessie and James in some sort of dangerous or difficult situation they are in within the Pokémon universe.
One key moment could be when they protect each other from other villains or Pokémon. Another might be when they share a rare moment of vulnerability after a particularly tough defeat. Also, the times when they come up with plans together, showing their teamwork and the trust they have in each other, are important in their love story.
One common theme is unrequited love finally being realized. For a long time in the Pokémon show, their relationship was more of a comical partnership, but in fanfiction, the kiss can be a moment of that underlying love coming to the surface.
Well, there is definitely some 'jessie and james kiss fanfiction' around. If you're into more romantic - themed ones, you might find some where the kiss is a turning point in their relationship. Others could be more comical, like it happens by accident during one of their zany schemes in the Pokémon series.