It could be about a magic spell gone wrong that makes the ponies shrink. Maybe they have to find a way to reverse it while being so tiny and facing big challenges like avoiding being stepped on by normal - sized animals or getting lost in the grass.
Well, perhaps it starts with a strange artifact in Equestria. One of the ponies accidentally activates it and it emits a shrinking ray. Then the story would follow their adventures as they try to figure out how to get back to normal size. They might encounter miniature versions of their usual foes or discover new, tiny magical elements in their shrunken state.
Twilight Sparkle could be the main character. Since she is very studious and often gets involved in magical experiments, it's likely that she might accidentally cause the shrinking and then lead the effort to fix it.
One possible plot could be that a baby pony loses its diaper during a race and all the other ponies help it find a new one. It could be a fun and cute story about friendship and helping each other.
A possible plot could be that a magic spell goes wrong in Equestria and accidentally creates a vore - like situation where ponies are being 'absorbed' into some sort of magical vortex. Then the main characters, like Twilight Sparkle, have to find a way to reverse the spell and save their friends.
Maybe it could be about a little sister who accidentally shrinks due to a magical spell. Then she has to face all kinds of challenges in a world that has suddenly become huge for her, like trying to get back to her normal size while avoiding being stepped on by the family cat.
Perhaps in a shrinking little sister story, there's some sort of scientific experiment gone wrong in the house. The little sister is caught in the blast and shrinks. She has to communicate with her family in creative ways since they can't immediately see her. She might use her wits to get their attention, like making tiny fires to create smoke signals. In the end, her older brother, who is a science whiz, figures out how to reverse the process.
It's about the adventures of the little ponies. They live in a magical land and often have to face various challenges together, like dealing with bad weather spells or unfriendly creatures. And they use their unique powers and friendship to overcome difficulties.
Well, the plot might revolve around a group of ponies who enter a competition where one of the challenges accidentally causes butt expansion. They have to work together to overcome the embarrassment and continue in the competition. Say, in a talent show in Ponyville, a misfired magic trick during a performance by Fluttershy makes her and some of her friends' butts expand. They then use their unique situation to create a new act that involves their now - larger behinds and end up winning the show because of their creativity and ability to adapt.
The main plot might revolve around population inflation. If there's a sudden influx of new ponies or creatures into the land of Equestria, there would be more demand for resources like food, shelter, and jobs. This could lead to inflation as the supply struggles to keep up with the increased demand. Ponies would have to adapt to the new economic situation, and there could be conflicts and cooperation as they try to deal with it.
The plot could be about a baking competition in Ponyville where all the ponies have to make cupcakes. Each pony has their own unique style and recipe. Applejack might use apples from her orchard in her cupcakes. The ponies compete, and the judges, like Princess Celestia and Princess Luna, have a tough time choosing the winner because all the cupcakes are so amazing.
The plot might involve an accident with a magic spell. A pony accidentally casts a spell that makes them age regress. This pony then has to navigate their world as a younger version of themselves. They might face challenges like being too small to reach things or not being taken seriously by other ponies. But through it all, they learn valuable lessons about growing up and friendship.