One popular Pinkie Pie 'My Little Pony' short story is 'Pinkie Pie's Party Planner'. In this story, Pinkie Pie is in charge of planning a big party in Ponyville. She goes all out with her usual enthusiasm, coming up with crazy and fun ideas for decorations, games, and treats. But of course, there are some little hiccups along the way, like when the balloons she ordered are the wrong color. However, with her positive attitude and the help of her friends, she manages to turn it into an even more amazing party than originally planned.
The main elements are Pinkie Pie herself, as she is the driving force behind the cupcake story. Then there are the cupcakes, which are always bright, colorful, and delicious - looking. Also, the act of baking is important. Pinkie Pie's energy while baking and her excitement to share the cupcakes with her friends are key parts of the story.
The Pinkie Pie cupcake story often involves Pinkie Pie's love for cupcakes. She's always super excited about them. In many episodes, she bakes and shares cupcakes, spreading joy in Ponyville with her delicious treats. Cupcakes are a big part of her character as she uses them to celebrate and bring a smile to everypony's face.
Her strong sense of friendship also adds to the appeal. Pinkie Pie is always there for her friends, and her stories often revolve around helping them out or making them happy. In the short stories, we see her go to great lengths to solve her friends' problems or just to put a smile on their faces, which is really heartwarming.
One great fanfiction could be 'The Adventure of Rarity and Pinkie Pie'. In this story, they might go on a journey to discover a new type of fabric for Rarity's designs, with Pinkie Pie's humor adding fun twists along the way.
Another place to find them is Archive of Our Own (AO3). It has a broad range of fan - created works, including many My Little Pony stories. Just use the search function and type in 'Rarity and Pinkie Pie' to get relevant results.
Twilight would probably be very organized about it. She'd make sure Pinkie Pie has all the information she needs regarding pregnancy in the pony world. Rainbow Dash might be a bit over - enthusiastic at first, offering to fly around and get anything Pinkie Pie desires. Rarity would likely start making cute little baby outfits right away, while Fluttershy would be there to offer gentle emotional support and make sure Pinkie Pie is as calm as possible.
One plot idea could be that Pinkie Pie discovers she's pregnant and has to deal with the changes in her daily life. She might struggle to throw her usual energetic parties while also taking care of herself. Another could be that her friends in Ponyville rally around her, each offering their own unique support. For example, Twilight could offer to help with any magic - related pregnancy issues, and Applejack could provide lots of fresh apples to keep her healthy.
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.
The contrast between Pinkie Pie's outgoing nature and Fluttershy's shy nature is really appealing. It creates a lot of potential for interesting interactions and storylines.