Another theme is the exploration of their differences. Shigaraki represents chaos and destruction while Deku represents hope and heroism. Fanfics usually explore how these two opposing forces interact and influence each other. For example, in some fanfics, they start to understand each other's perspectives better as they spend more time together.
One common theme is redemption. Often, the male reader is seen as a sort of guiding light for Shigaraki, leading him towards a path of redemption or at least a change in his ways. For example, in many stories, the male reader's kindness makes Shigaraki question his own violent actions.
Often, in momo x bakugou fanfic, there's a contrast between Momo's calm and intelligent nature and Bakugou's fiery and aggressive one. This contrast creates a lot of interesting dynamics.
Often, in 'uraraka x bakugou fanfic', there is a lot of emotional growth. Bakugou might learn to control his temper better because of Uraraka, and Uraraka might become more confident in herself. The fanfic uses their relationship as a vehicle for personal development for both characters.
Yes, there might be some out there. You can check fanfiction websites like Archive of Our Own (AO3). There are a large number of fan - created stories in the My Hero Academia fandom, and it's possible to find one with this particular pairing and plot. Just use the search function on the website and type in relevant keywords like 'Bakugou x Uraraka pregnant' to narrow down your search.
One great 'Shigaraki x Deku' fanfic is 'Unlikely Bonds' which explores a unique friendship-turned-something -more between them. It delves deep into their complex characters and how they might interact in different scenarios outside of the main plotline.
Shigaraki is not dead in the manga. The storyline has many twists and turns, and his character plays a significant role, so his survival adds to the ongoing drama and suspense.
In some bakugou x reader stories, the reader might be a healer type. Bakugou gets injured during a fight and the reader has to take care of him. At first, he's resistant but gradually he softens up towards the reader as he realizes their kindness and how they're not afraid of his brashness. It shows a different side of their relationship.
The theme of rivalry - turned - friendship is also quite common. At first, they are often portrayed as rivals due to their different outlooks and goals. But as the story progresses in the fanfic, they start to form a bond that goes beyond just being opponents, which makes for some really interesting character development.
One common theme is growth. Bakugou is often shown to grow as a person through his relationship with the reader. For example, he might become more patient or learn to better express his emotions.