Something goes wrong with the portal between Equestria and the human world, leaving Twilight trapped for a few months. That wouldn't be so bad... if she wasn't also a child
Not long after the Dazzlings are defeated, things return to normal at Canterlot High. That is until Sunset Shimmer stumbles upon a five-year-old Trixie
(Story idea requested by superfun. Contains age regression, diapers, and diaper useage! Reader discretion is advised.) When Diamond Tiara and Silver Spoon lose a bet to the CMC, they are turned into foals for a week. The CMC must care for them.
(A collab with Latecomer, open to all authors. Stories should be SFW with some potential PG content, rated Teen to be safe.) A collection of stories involving various characters undergoing potty training, to varying results.
(Rated Teen to be safe.) Cheerilee decides to turn herself into a foal, so her students will have hoofs on experience taking care of one. But are her students up to the task of caring for their foalified teacher?
(Unofficial sequel to "Mistaken For A Foal" by Matt11, features light diaper useage. Reader discretion is adivised). Fleetfoot wakes up one morning to find that she's been turned into a foal, and she's forced to stay at a daycare run by an old mare.
Future universe. "Sister" Princesses Sunset Shimmer and Twilight Sparkle mourned the loss of Equestria's favorite Princesses - The royal natural-born alicorn sisters Celestia and Luna. In an attempt to win them back, they resurrect them - as fillies.