Perhaps Doctor Whooves is not a medical doctor or a time lord, but a doctor of psychology.

The following are his journals after he receives instructions from Princess Celestia to permanently set up shop in Ponyville to keep an eye on Twilight Sparkle and her friends, where he learns more than he bargained for.

View the Google Docs table of contents: https://docs.google.com/document/d/1gCeHce9BTZ48P5fxNQDHq7diYlNqJIbkZNdMGLN3H5k/edit?pli=1

It has been weeks since the defeat of the Dazzlings, and Sunset Shimmer's friendships have only gotten stronger. Whilst finally relaxing in the times of peace, Sunset discovers an old enemy: Sonata Dusk. Strangely alone and apparently homeless, Sonata's luck seems to be at its all time low.
Seeing a little of herself in the former siren, Sunset embarks on a mission to help Sonata find friendship.

(For anyone who liked the old cover art, here's a side-by-side comparison of the old and new: http://daniel-gleebits.deviantart.com/art/Go-Compare-Twiddles-moustache-581352606 )

TV Tropes page: Feel free to add whatever tropes you find
http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/TheEveningSonata

Although Flash Sentry is overjoyed to be engaged to Princess Twilight Sparkle, Celestia withholds her blessing until she can interview the couple. At the interview, Flash is even more surprised than Celestia to find that something is indeed terribly wrong. This revelation leaves him questioning whether he ever really knew either princess.

Chapters 1-10 edited by the inestimable Zaponator, who encouraged me to write in the first place.

Featured on Equestria Daily, 5/14/14