You could make an OC that is a Pegasus from a far - off cloud kingdom. This OC comes to Ponyville because they heard about the magic of friendship there. They start off as a bit of a loner but gradually open up as they experience different adventures with the local ponies.
One idea could be to create an OC who is a unicorn with a special power related to time manipulation. This OC could accidentally get stuck in different time periods in Equestria and have to rely on the mane six for help while also learning about friendship in each era.
Well, an OC who is a talented artist but is too shy to show their work could be a great plot. The ponies in Ponyville discover the OC's talent and encourage them to share it. Or an OC with a time - traveling ability. They accidentally mess up the timeline in Equestria and have to work with Twilight and her friends to fix it.
Well, perhaps there's a plotline where a new pony arrives in town and has a special cupcake recipe that the others have never tasted. This leads to a series of events where the ponies learn about different cultures through cupcakes. The ponies then work together to incorporate this new recipe into their own baking traditions, strengthening their friendship in the process.
One interesting fanfiction could be about a new pony arriving in Ponyville with a unique magic ability that the ponies have to learn to understand and accept. This often involves adventures and challenges that test their friendships.
One interesting plot could be about the ponies working together to save their village from a mysterious storm. They each use their unique talents, like Rainbow Dash's speed to warn everyone, and Fluttershy's ability to calm the scared animals.
Well, you can focus on creating a really unique OC design. For example, give it an unusual color combination or a distinct cutie mark. Also, develop a complex backstory for your OC that ties into the lore of the My Little Pony universe in an interesting way.
Perhaps the OC has a special talent related to baking, like creating unique and magical pastries. Pinkie Pie discovers this and they team up to create the most amazing party treats ever. They could go on adventures together to find rare ingredients and along the way, form a strong friendship.
Maybe a changeling OC who gets lost in Equestria during a mission and is found by one of the main ponies. The OC could initially be distrusted, but as the story progresses, they form an unlikely friendship. The OC could then start to learn about friendship and love from the ponies, which would change their view of the world and themselves. For example, they could start to see that there are better ways to get the energy they need than stealing love.
You could create an Alicorn OC who was born without wings but has an incredibly strong horn magic. She is shunned by some of the other Alicorns at first. But through her determination and kindness, she proves that she is just as worthy. She might go on a journey to discover the origin of her unique situation and along the way make friends with all kinds of ponies.
The main characters would likely include Twilight Sparkle. She's very studious and might use her magic to help with cupcake - related tasks like getting the right amount of flour or sugar. Pinkie Pie is also bound to be a main character as she loves parties and cupcakes are a big part of parties in Ponyville.
First, think about their appearance. You could give them an unusual coat color or a special cutie mark. For example, a coat color that changes with their mood. Then, consider their personality. Maybe they're a bit of a loner but really kind at heart. Also, their backstory is important. They could be from a different part of Equestria that has its own unique culture.