Princess Sweet

Princess Sweet is a fanfiction written by Rosebudthefoal on FiMfiction.net about a mystery revolving around Sweetie Belle being an alicorn.

Summary
Sweetie Belle wakes up one morning to find that her coat and mane have changed to odd colors. Horrified at how unfashionable her younger sister is, Rarity tries many things to get the dye out of Sweetie coat, including taking multiple baths and putting more dye over it. After a long time, they give up and visit Twilight for a solution. Twilight attempts to cure it, and finds that instead of dye, her coat has been changed by magic. She undoes the spell and Sweetie Belle is releived to be back to normal. However, Rarity notices that two old scars on the filly's sides have reappeared, but they had disappeared years ago. In talking about this, Rarity remembers a big order she has to fill and rushes off, leaving Sweetie to go play with her friends.

Sweetie Belle finds Scootaloo, racing past on her scooter. After her attempts to stop her by calling out her name, Sweetie unknowingly uses magic to freeze her wings. Scootaloo suggests that they could get some good crusading out of Sweetie's newfound use of magic. Sweetie agreed and attempted to undo the spell she had put of Scootaloo's wings, but instead had managed to make herself float upside down int he air. she is saved by Rainbow, who appears and drags her to the ground. When the unicorn can't stop her magic, they go back to Twilight's to ask for help again.

Twilight fixes Sweetie Belle's magic and gives her a magic-blocking collar to prevent this from happening again. She allows Sweete and Scootaloo to leave, but, suspicous of these events, suggests to Rainbow that they should go try and find out what could have caused Sweetie's odd behavior. Meanwhile, Sweetie and Scootaloo are riding in the wagon to Sweet Apple Acres when Scootaloo stop. Sweetie Belle falls out, and Scootaloo points out that the unicorns mane is flowing. Upon looking in her reflection in a window, Sweetie Belle sees that her mane and tail are indeed blowing in non-existant wind much like the Princesses' do.

Next, Twilight and Rainbow Dash visit Rarity to try and get information about Sweetie Belle. Rarity, who is busy with her order, gives them the address of a hotel in Canterlot where her parents are. Rainbow Dash carries Twilight there on a cloud after the unicorn casts her cloudwalking spell. Upon landing in Canterlot, Twilight is both scared and annoyed with Rainbow Dash about the speed of their trip, but they had landed right outside the building they were looking for. They go in and eventually find the room of Rarity’s parents, Pearl and Magnum. After Twilight explains the situation, Pearl admits that Sweetie Belle is not their daughter and tells how she had found her as a foal in Canterlot park with two injuries on her back.