There are some out there. You can start by looking on popular fanfic platforms like Archive of Our Own. Just search for 'bowser x reader yaoi' and you might find some interesting reads. However, the availability and quality can vary.
Often, there's a theme of adventure. Since Bowser is associated with the Mario universe which is full of adventure, the 'bowser x reader fanfiction' may have the two going on quests together. There's also the theme of discovery. The reader discovers new aspects of Bowser, and Bowser discovers new emotions through the relationship with the reader. This can be really interesting as it gives a new perspective on his character.
Some fanfics use the 'redemption' trope. Bowser might start off as his typical villainous self, but through his interactions with the reader, he begins to change for the better. There's also the 'mysterious stranger' trope where the reader is new to Bowser's world and he is intrigued by this unknown entity, leading to their relationship developing.
One common theme is the power dynamic. Bowser is often depicted as a powerful and dominant character, which can create an interesting contrast with the reader. Another theme is the idea of forbidden love, since it's a bit of an unusual pairing.
Another option is to join some Nintendo - related or fanfic - specific forums. People there might be able to recommend some good 'bowser x reader yaoi' fanfics. They may even have their own collections or know of some lesser - known but great fanfic writers in this genre.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics, including Bowser x reader ones. You can search for specific tags like 'bowser x reader' and then filter by things like rating and word count. Fanfiction.net is also a well - known platform that may have some good ones. Just be sure to check the reviews and ratings of the fics to find the good ones.
Well, there's 'Bowser's Heart'. In this fanfiction, the writer delves deep into Bowser's character while building a relationship with the reader. It shows his softer side that you don't often see in the original games. And then there's 'The Reader and Bowser's Adventure' which takes the two on an exciting journey together, full of twists and turns.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, including Bowser x reader yaoi ones. Just use the search function on the site and type in the relevant keywords.
One possible theme could be family. As Bowser and Bowser Jr. are father - son, the fanfic could explore the dynamics of their family relationship. It could show how they support each other, or how Bowser is trying to raise Bowser Jr. to be a worthy heir.
Well, a 'bowser x bowser jr fanfic' could be about their relationship in an interesting way. It might explore how Bowser Jr. looks up to Bowser as a father figure. Maybe it shows them on an adventure together, facing challenges in the Mushroom Kingdom. For example, they could be trying to take over a new area and Bowser is teaching Bowser Jr. the tricks of the trade.