Sunset Shimmer's pregnancy could strain some relationships. For example, if there are ponies who are jealous or envious of her new situation, there could be some tension. However, with her true friends, like the Mane Six, it would strengthen their bond. They would rally around her, offering emotional support and practical help. Her relationship with her family, if it's introduced in the fanfiction, would also be affected. Her parents might be overjoyed or worried, depending on the circumstances, and this would change how they interact with her.
Sunset Shimmer and Amiss could have a more complex relationship. Maybe Amiss has a past with Sunset that she doesn't fully remember. As the story progresses, Amiss could do small things to jog her memory, like showing her a familiar object or taking her to a place from her past. This would create a sense of mystery and draw Sunset closer to Amiss, while also making Anon a bit jealous, which in turn would add more layers to his relationship with Sunset Shimmer.
A common theme is redemption. Since Sunset had a bit of a dark past in the MLP universe, many fanfictions focus on her journey to make up for her wrongdoings and become a better person, or pony in some cases.
A third idea is that the male OC is from a different dimension. He accidentally lands in Equestria and meets Sunset Shimmer. At first, Sunset is suspicious of him but realizes he's lost and in need of help. They embark on a journey to find a way to send him back home. Along the way, they encounter various obstacles and have to rely on each other's strengths. This adventure brings them closer together, and by the time they find a way for him to return, they have developed deep feelings for each other.
Kushina's pregnancy could also lead to new relationships. Maybe she meets other pregnant women in the village and they form a sort of support group. This could be a new aspect of her social life. And with the medical ninja taking care of her, she could develop a closer relationship with them, learning more about the medical side of pregnancy and childbirth in the ninja world.
There's also 'Sunset and Twilight's Adventure Beyond Equestria'. This fanfic takes them on a journey to a new land where they have to learn about a different kind of magic. It's full of exciting twists and turns as they face challenges together and grow as friends. It really delves deep into their characters and how they can rely on each other.
Friendship is a very common theme. Since they are both important characters in the MLP universe, many fanfictions explore how their friendship develops over time, whether it's through shared adventures or helping each other out in difficult situations.
One great MLP Sunset Shimmer fanfic is 'Sunset's New Beginning'. It explores her journey of self - discovery after joining the main group. It shows how she overcomes her past mistakes and builds new relationships.
A common theme is her struggle with her past. Since she had a bit of a dark past in the MLP universe, many fanfics explore how she deals with that and tries to move forward. For example, in some fanfics, she has to face her old friends or enemies from her pre - friendship days.
Her relationship with her parents would likely become more protective. They would be worried about her and the baby's safety. With her friends, they might be more helpful and supportive, perhaps taking on more of her duties so she can rest. And if there is a love interest, he would be even more attentive, constantly by her side to make sure she is okay.
I also like 'Sunset Shimmer: A New Beginning'. It explores what could have happened if Sunset had made different choices earlier. It delves into her backstory more and gives a fresh perspective on her relationships with other characters.