Man goes to convention dressed as multiple characters at once. Man purchases a Twilight Sparkle mask. Man regrets his decision as he ends up in a Pokemon-filled Equestria as another Twilight Sparkle. And then, something unexpected... Dawns.
A British soilder from WWI wakes up in Equestria, turns into a pony and trys to find a way back home. Within his journal entries, he finds out how Equestria really came to be.
Mr. Disc, the rehired art teacher for Canterlot High had an argument with a student when he get's pushed into the portal and into Equestria. Dazed and completely confused, he tries to figure out why every living things is afraid of him.
One night in 1986, the twelve year old Lauren Faust wakes up finding a talking pony under her bed. She follows the pegasus though a tunnel into a place called Equestria.
She had to do it. There was no other choice. The creatures who called themselves "humans" had invaded Equestria, and taken Luna and Twilight as prisoners. They have forced Celestia give up her body to them... in the name of science.