Once upon a time, if the term even applies, two young ladies decided to visit an Equestria, selected seemingly at random. Which would be nothing special, despite their attitudes towards ponies being so different, if one hadn't mentioned sandwiches...
Rainbow Dash finds a maimed, unconscious young colt on the edge of Ponyville and rushes him to the hospital, but nopony knows who he is and something about him seems off...
Darkest Knight is an eccentric young colt with a curious aversion to others. Behind the closed doors of reality and psyche, what could be plaguing him? And, more importantly, are the citizens of Ponyville at all prepared to deal with the revelation?
After 1000 years of tyranny and despair, one mare attempts to unleash ultimate evil, in a desperate bid to save her people and lead them to a brighter future. What she gets is not quite as advertised on the box.
In the alternate timeline where Sombra was not stopped, a human finds himself suddenly in Sombra's body... just after the dread tyrant has conquered Equestria.
Having a handful of humans stranded in Equestria is bad enough. Being the odd one out of the group for no reason... is even worse. How will Joey Belfort respond to this unfavorable circumstance?
If Ponyville's new repair-pony gets his way, the Mane Six won't even know he exists - and nopony in Ponyville will miss him for long once he's returned to Earth.