One common theme could be the clash of different cultures or ways of operating. Agents usually have their own set of rules and skills, and when they meet the world of Amestris, there's likely to be a contrast. For example, the use of modern - day tactics versus the more archaic or magical - based systems in Amestris.
I'm not sure of specific 'agents meet amestris fanfic' off - hand. You could try searching on fanfiction - specific websites like Archive of Our Own. They have a large collection of fan - created works and you might be able to find what you're looking for there.
Overall, the FMA manga set is quite complete. It includes all the major plot points and character developments. However, there might be some minor variations depending on the edition or printing.
The unique characters and their humorous interactions in fma comics often bring the laughs. The unexpected plot twists and comical situations also contribute to the fun.
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.