For his interference with so-called "lesser" lifeforms, The Doctor is being punished. His friends have had their memories wiped, he is barred from travel through time and space, they intended to exile him to Earth and, worse yet, they chose the wrong version of it. Through an error in their calculations and technology, the Doctor was sent to what is seemingly another Universe. One where hooves beat feet in the evolutionary race, and where magic exists side by side with technology.
The Mane Seven also have a problem. They just had a strange stallion crash into their tree with a blue box, completely unconscious. And while the rest of the girls are underway with helping him, Pinkie has a secret she needs to tell Twilight, about how she knows that unmistakable blue box... And maybe go for a quick trip to a new place. There's also the mysterious new sets of mannequins being given as "free samples" for every business in Equestria. What on Gaea could be going on..?
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An alternate universe, about midway through season 6 and right as the 3rd Doctor regenerates. An AU for both, you might say. This is one of our many, MANY day dreams. This is simply the first time we put it to paper. Well, monitor, but that's semantics. We do hope you all enjoy!