A human of low character dies and gets sucked into Equestria as a copy of Twilight. The new mare then proceeds to cause chaos for the ponies, but she tries to help... and, more importantly, make some money
A routine rescue from a no-name villain goes wildly awry as Celestia is flung into the lethal, living nightmare that is Tartarus. No great problem for an immortal, but to Celestia's absolute horror, Twilight has followed her in.
After dying one night, I find myself elevated to semi-Divine status and given a tiny universe to do what I want with. I decide to create a version of Equestria, among other worlds. Not sure how it'll all end, but I'm enjoying myself!
A pony wakes up to enjoy his 742nd day in Paradise. He should be alright, though. As long as he doesn't resist the soothing voice inside his head. Or any of the strings tied to him.