One common theme could be the clash of different magical systems. In Harry Potter, there's the magic based on spells and potions, while in FMA there's alchemy. Another theme might be the exploration of different cultures and values. The pride aspect could also play into characters showing their unique identities and abilities from both universes.
I'm not sure about a specific one off the top of my head. But you can try searching on fanfiction.net or Archive of Our Own. They usually have a wide range of crossover fanfictions.
😋I recommend "May Your Love Last Forever" to you. This was a modern romance novel about a wealthy family. The female protagonist was forced into a desperate situation, and the male protagonist could help her take revenge, so that her evil intentions could be realized. In this book, the male protagonist's arrogance and the female protagonist's resistance were very domineering. It was worth reading. I hope you like my recommendation.😗
I'm not sure who the absolute best is, but there are some authors who are well - known in the fanfiction community. Some of the more popular ones might be those who have a deep understanding of the 'Fullmetal Alchemist' universe. They can really capture the essence of Edward and Hohenheim's characters and their relationship.
Some fanfictions might center around Van Hohenheim's connection to the homunculi. For example, a story could explore how he feels about being their creator in a more emotional and complex way. It could also be a fanfiction where he teams up with Edward and Alphonse to fight against a new threat that is related to his past actions. This would give a chance to see his character develop further in a different context, and show his loyalty to his sons in a more extreme situation.
One interesting fanfiction could be about Edward and Hohenheim going on a journey together to uncover a long - lost alchemical secret. They might face various challenges along the way and bond over their shared knowledge of alchemy.
I'm not entirely sure specifically about 'fma visual novel' as there could be many visual novels with that name or abbreviation. It might be related to the 'Fullmetal Alchemist' (FMA) series, in which case it could be a visual novel that tells a story within that universe, perhaps exploring different storylines or character relationships from the original anime or manga.
I'm not sure specifically if there is a publicly available 'fma riza pregnant fanfic'. You could try searching on some fanfiction websites like Archive of Our Own or FanFiction.net.
The FMA manga ended with a powerful conclusion. All the loose ends were tied up, and the characters' journeys came to a meaningful conclusion. It left fans with a mix of emotions - happiness for the characters' growth and a bit of sadness to say goodbye.