Yes, there are some out there. You can try searching on popular fanfiction websites like Archive of Our Own. Just use the relevant tags when searching to narrow down the results.
Archive of Our Own is a great place to start. It has a large collection of fanfiction, and you can easily search for Sullivan x Mike mpreg stories using the search bar and relevant tags.
One common theme is friendship. Their bond is often explored, like how they became friends and how it withstands difficulties. Another is loyalty. In many fanfictions, they show unwavering loyalty to each other.
Sure. One popular Sullivan x Mike fanfiction is 'The Bond Between Them'. It beautifully explores their relationship, showing how they support each other through various challenges in their fictional world. Another one is 'Sullivan and Mike's Adventure' which takes them on an exciting journey full of twists and turns.
I'm not sure specifically which 'top stories' Mike Sullivan has as there's not enough context. Maybe they could be about current events in his local area, or related to a particular field he is involved in.
There's also 'Sullivan and the Unlikely Ally' which is a great read. The author does an amazing job of portraying the OC's unique personality. The interactions between the OC and Inspector Sullivan are filled with tension and chemistry. It really makes you root for their relationship as the story progresses.
One great 'James P Sullivan x Reader Fanfiction' is 'Sully's Heart'. It really captures his gentle nature well. The story shows how he and the reader character gradually fall in love through various adventures in the monster world. The descriptions of their interactions are really sweet and it makes you feel like you're right there with them.
One common theme is friendship. Many fanfictions explore the deep and unique friendship between Mike and Will, how they understand each other better than anyone else. For example, they might show the two sharing secrets that they wouldn't tell anyone else.
Another characteristic is the exploration of their world. Fanfictions may create new scenarios in the monster world they live in. They could introduce new monsters or new places that Mike and Sully have to deal with, which makes the story more exciting.