Well, a lot of things could happen. Maybe the human gets transported into the My Little Pony world. They could befriend the ponies and have all sorts of adventures, like helping them solve a problem in Ponyville. Or perhaps the ponies come to the human world and they all have to figure out how to get along in a very different environment.
The human's interaction in the My Little Pony fanfiction could vary. If the human is kind - hearted, they would likely be welcomed by the ponies. They could participate in pony festivals and learn about their traditions. However, if the human is more reserved, it might take longer for them to open up and engage with the ponies.
Some concepts include the exploration of new places. Humans in Equestria would likely be curious about all the different regions, like Canterlot or Ponyville. They would experience the unique landscapes and climates. There's also the concept of how humans are perceived in Equestria. Are they seen as strange or exotic? And how do they fit into the social hierarchy? Do they have to abide by the same rules as ponies? It's all very fascinating to think about.
It can contribute by adding new perspectives. Since it involves humans in Equestria, it gives fans a chance to see the world from a different point of view. It can also inspire new fan art. Artists might be intrigued by the idea of humans interacting with ponies and create amazing drawings. Moreover, it can start new discussions among fans about how the two species would really interact.
A frequent theme is cultural exchange. Humans and ponies learn from each other's cultures. For example, ponies might learn about human technology and humans might learn about pony magic. Also, the theme of self - discovery is quite common. The human characters often discover new aspects of themselves while in the pony world, whether it's about their courage, kindness or other virtues.
In a fanfiction, Cadence's pregnancy could bring out different emotions. Shining Armor, her husband, would be overjoyed but also a bit nervous. Cadence herself might face some challenges. Maybe there are some old Crystal Pony traditions related to pregnancy that she has to follow. And the other ponies in Equestria would be sending their well - wishes and gifts from all over the land.
One possibility is that Deadpool is on a mission in his own universe and there's a portal malfunction which sends him to the My Little Pony realm. There, he might meet Twilight Sparkle who is intrigued by this strange new being. Deadpool could try to teach the ponies some of his combat moves in a really goofy way, while the ponies introduce him to their magic and harmony. This could lead to a story where they team up to face a common threat, like an evil force that wants to disrupt the peace in both their worlds.
It could be a more action - packed story. The soldier could be from a world at war, and when he meets the My Little Pony characters, he discovers that their world is also facing some kind of danger. He then teams up with the ponies, using his combat training and the ponies' unique magical abilities to fight off the common enemy. This could be a story about how different strengths can be combined to overcome difficulties.
There's Sunset Shimmer who is a popular human character in a lot of fanfiction. In her human form, she can have a complex personality, sometimes being a bit of an outcast at first but then finding her place. Also, Pinkie Pie as a human is known for her bubbly and fun - loving nature. She brings a lot of energy and chaos in a humorous way to the fanfiction stories. Applejack as a human might be strong - willed and hardworking, just as she is in her pony form.
A common theme is friendship. Just like in the original My Little Pony series, stories about human Spike often revolve around his relationships with other human - like versions of the ponies. Another theme could be self - discovery. As Spike is in a different form, he may go through a journey of understanding himself better.