One place to find Prussia x Liechtenstein fanfiction could be Archive of Our Own (AO3). There are often various works exploring their relationship in different settings, such as historical AUs or modern-day meet - cutes. Just search for the relevant tags.
Prussia in the fanfic is likely to be portrayed as proud and somewhat of a maverick. He has a long and storied history that gives him a certain swagger. Germany, in contrast, might be seen as more reserved and focused on order. Prussia could be the one to initiate grand adventures, while Germany is the one who ensures everything is in proper order during those escapades. The reader gets to experience the best of both worlds, the spontaneity of Prussia and the stability of Germany.
It's likely to have a niche popularity. Only a specific group of fans who are interested in both the relationship between Germany and Prussia and the concept of mpreg would be drawn to it.
In the 'germany x prussia mpreg fanfiction', it could potentially be a creative exploration of their relationship. The idea of mpreg in this context can be seen as a tool for fanfiction writers to play with gender norms and traditional relationship expectations. It may also incorporate elements of their historical past, like their shared heritage and how that might play into the story of a male pregnancy. For example, how their cultural values could influence their reactions to such a situation, whether it's shock, acceptance, or a complex mix of both.
A possible plotline is that a magical lemon from Liechtenstein finds its way to Switzerland. It has special powers and causes some chaos in Switzerland at first, but then people from both countries work together to control the power of the lemon. It could be a story full of humor and unexpected twists.
One common theme is the clash of cultures. America is young and brash, while Prussia has a long and proud history. This contrast often leads to interesting interactions. Another theme is friendship or rivalry. They can be seen as competitors or as comrades depending on the story.
One common theme is the clash of personalities. Prussia is often depicted as bold and assertive while England is more reserved. Their interactions based on these differences are a big part of many fics.
A common theme is the exploration of their historical rivalry. Fanfictions often play with how they could overcome or at least manage this rivalry in different scenarios.
A common theme is the clash of cultures. Russia has its own rich Slavic culture, while Prussia has a distinct Germanic influence. Fanfictions often explore how these two different cultures interact when the two characters are together.