Sunset Shimmer goes to sleep one night just casually wishing that she wanted to be a pony again, but the next morning she finds that her casual wish has come true. Now she has to wonder if she can turn back and more importantly does she want too?
After ascending to princesshood, there was still the matter of Sunset's official coronation. Of course, she was going to invite her friends along for the event. It went about as well as you'd expect.
Sunset Shimmer is a pony trapped in a human's body. This causes her much angst. Luckily she doesn't have to suffer through it alone. Hurt/Comfort, Sunlight Friendshipping (w/ Princess Twilight), Oneshot.
When the portal opens between Equestria and the human world, Twilight Sparkle and Sunset Shimmer are reunited, only for Twilight to find out something about Sunset she did not know: Sunset is older than Twilight thought.
When Sunset sees herself as an alicorn in a magical mirror, she goes looking for answers, eventually going through the mirror into another world. Some things are better left alone though, as she finds herself trapped in the other world as a child.
Investigating a mysterious pulse of magic when trying to avoid repairing the wedding, Twilight stumbles upon the magic mirror only to get trapped on the otherside. Will a less angry Sunset help her?
After following Sunset Shimmer through the portal and becoming stuck in the human world, Princess Celestia struggles to adapt while blocking Sunset's ambitions with her own popularity.
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.