An accident with the Mirror Portal ends up with Twilight stuck as a small pony in the Equestra Girls' world. Her friends can't get over how cute she is.
For Twilight, the increased lifespan that came with princesshood had forced her to outlive her friends, but thanks to Rarity, she will learn that centuries could be lived in but a single day.
Rarity jumped a bit, opening an eye hazily to look at what she had magicked. Somehow, a white wing was stuck underneath her. Wait. A white....wing? / Raricorn/Twicorn ship, sad later, rated for possible fluff later.
Rarity has a secret she must come out about to her crush Fluttershy. And has a quite terrible friendship problem with Spike about her secret. Life isn't easy for this "mare".
Applejack was happy to return to her family after her stint in Manehattan, but there was something she brought back from her trip. A small mistake and a choice that haunts her to this day.
The Mane Six get married and have kids! The only problem is that their kids are enemies. So when Queen Chrysalis' daughter kidnaps their parents, the children must work together to save their family.
During what started as a perfectly fine Lunch, Twilight learns that her friends have somehow gotten it into their heads that she is in a relationship with her mentor and idol Princess Celestia.
Shining Armor has been infected by a Changeling poison that threatens to destroy his magic or worse. When Twilight and her family are tested to see if they could be potential horn marrow donors, an old family secret is brought to life.
Princess Twilight has come back to the other world to catch up with her five human friends (and one pony-turned-human friend). What could be better than visiting Sugar Cube Corner, talking about the latest goings-on while sharing a brew with friends?
Now that the link between the human world and pony world is constantly open through Twilight's magic, students (whether by accident or on purpose) will wander to the other side.
Rarity can't sleep. Applejack had the audacity to fall asleep facing Rarity, and now she can't get kissing her friend out of her mind – and isn't sure if she wants to. But kissing your friend while she's sleeping is wrong...