Well, often in rolf x kevin fanfiction, the theme of discovery is present. This could be about discovering new things about each other, like hidden talents or secrets. Also, the theme of loyalty might be there. They could be in a situation where they have to stay loyal to each other against all odds. For example, in a story where they are part of a group and there are internal conflicts, but they remain loyal to one another.
One great Ben x Kevin fanfiction could be about their adventures in a parallel dimension. In this story, they might face new aliens and challenges that test their friendship even more. Maybe they find a powerful alien artifact that only works when they combine their unique abilities, leading to a deeper understanding of each other.
There are many platforms where you can find rolf x kevin fanfiction, such as Archive of Our Own (AO3). Just search for 'rolf x kevin' on it, and you'll get a list of relevant works. Some might be about their adventures together, or their relationship development in a fictional setting.
In 'Kevin x Edd mpreg fanfiction', a frequent theme is the emotional journey of the two characters. Kevin might be dealing with feelings of protectiveness and responsibility, while Edd could be experiencing a range of emotions from joy to anxiety about the pregnancy. Also, the theme of acceptance, both self - acceptance and acceptance from others, is often explored.
I'm not sure specifically about 'Kevin x Edd mpreg fanfiction'. You could try searching on popular fanfiction websites like Archive of Our Own. They usually have a wide variety of fanfictions, and you might be able to find something related there.
Adventure is also quite common. They could be on a quest together and during that journey, their relationship blossoms. For example, they might be exploring a mysterious place and rely on each other, which brings them closer. It's a great way to build their connection in the story.
One common theme could be the exploration of the relationship between Ben and Kevin in a new and unique context due to the mpreg aspect. It might involve how they deal with the unexpected situation and how it changes their dynamic.
One popular type could be adventure - themed ones, where Kevin and Ben team up to face a powerful new alien threat. They might use their combined skills and powers to save the day.
Some fandom - specific forums might also have threads dedicated to sharing kevin x ben fanfiction. These can be a great source as the stories are often recommended by fellow fans who have already read and liked them.
Another theme might be adventure. The fanfic could put them on an adventure together, facing challenges and solving problems side by side. This can add an exciting element to the story and also show how their relationship develops during the adventure.