Allen goes to sleep one night and when he wakes up he finds himself in the body of a pony. One of the villains to be more exact.
Pinkie and Jak grow up together, and with Daxter's help they work to save the world from the dark forces that seek to do it harm.
Sunset's plan to dominate the Mirror World, so she can conquer her home world, ends up blowing up in her face and sends her to the world of Azeroth, to be risen as a Death Knight to serve the Lich King.
Starswirl and Autumn Blaze grow up on Veldin with a Lombax called Ratchet, where they'll begin an epic journey to save their galaxy from the dangers that plague it, unaware of the dangers that exist in their universe.
Princess Luna and Princess Celestia each have their secrets that they'd rather not tell their subjects. Unfortunately for them, one of their darker secrets has chosen to come back.
Amaryllis, a changeling infiltrator for Chrysalis' hive, goes looking for her missing queen, but is teleported to a brand new world in the process, one that is unlike anything she's seen so far, while also being in the middle of a war.
Celestia and Luna must once again face an evil that they, Discord, Chrysalis, and Sombra nearly lost to the first time they fought him.
Sombra, Fluttershy, and Radiant find themselves in a strange world and join Sora, Donald, and Goofy in their quest to find their missing friends, unaware of the true evil lurking in the darkness.
Pinkie Pie and Octavia end up being sent to a brand new world, one made of blocks and having different rules to live by, where they join forces with Steve and Alex to see what the world has to offer.
Tirek, following his defeat at the hooves of Twilight and her friends, is transported to a world unlike anything he could imagine, filled with large trees, violent creatures, and danger around every corner.
Adagio, Aria, and Sonata return to the world of Cole MacGrath to finish what they started and help a new Conduit find his place in life.
That is the question Trixie, Derpy Hooves, and Lyra find themselves asking when they awaken in a strange world. A world with gateways leading to other worlds.
Grogar finds himself transported to a fleet that is making the voyage to the New World, where he must adapt to his new body and face the dangers of his new world... even if it means facing the monsters of the New World.
Tirek awakens to find himself in a state of undeath, in a foreign land, and must use everything at his disposal to survive the dangers that await him.
Four friends awaken from a party to find themselves in Equestria. How will the six of them deal with being ponies and living in a land they are unused to?