Derpy Hooves is secretly a changeling.

Nopony particularly notices, or cares.

(New 9/15/19: Spanish translation by Spaniard Kiwi! Thank you!)

For most of Applejack's life, she didn't know what she was. True, she understood who she was well enough.
But ponies don't change shapes, nor do they get strength from love.
Applejack never thought too hard on it... until the events of a certain wedding brought about some harsh realizations.
Now, with Equestria still reeling from the surprise attack, will Applejack manage to come to terms with what she is? Will she even be able to keep her secret safe?
For if the royal guards don't get her first, the conspirators in the shadows just might...

Image provided by Heilos -

The Doctor had left Derpy to take care of something that he worried that Derpy will get hurt on. While they are both broken hearted in leaving. Derpy gives a Pinkie Promise (the ones you HAVE to keep) to wait for the Doctor on a hill where they first met. While the Doctor promises to come back. But they don't expect to be gone for 5 years....

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Ditsy Doo or known as Captain D of the royal guard has been stuck in war for 2 and a half years. War that happened when Princess Celestia was killed and Princess Luna got sick and defenses were weakened. It was always up to the Captain now. But when a clot the enters in a blue box comes back the war is suddenly on a new turn. Will the Doctor save Equestria once again? What has happened to Captain D/Derpy? And what will the Doctor do to get her back?

This is my first My Little Pony FanFiction. This is really the only shipping I really support in this show. This IS the Doctor based on the 11th doctor but I am more of a Matt Smith fan then David Tenate. You really don't need to watch Doctor Who to understand this but some jokes will be based off it. I also kinda like to go with things that happened in Doctor Whooves and Assistance from YouTube. So yeah. I hope you enjoy this!

-DO NOT OWN COVER PIC ITS BY http://www.deviantart.com/art/General-Derpy-261702196-

ON HOLD FOR EDITING AND PROOFREADING