Pandinus Imperator (You can call him Pan, he won't mind) is knocked back in time during the Canterlot Invasion, and accidentally kills King Sombra on arrival. Instead of being executed, the changeling is surprised to find himself being hailed as a hero, and is promptly put on the throne as the new monarch, the Crystal Emperor. However, Pan now faces a great many problems, among them Celestia and Luna, who seem certain that the changeling is secretly up to no good, as well as several political factions secretly plotting to undermine his reign. There's also the tiny problem of the constant snowstorm that threatens to cut the city off from the outside world permanently.
The Crystal Ponies need a hero now more than ever before. Why did they get a changeling instead?

We Has A TvTropes.

While not truly a part of Bucking Nonsense's Changeling-Verse, the same rules regarding changeling abilities and society apply.

Cover image provided by gabapple, used with permission.

The Cutie Mark Crusaders have always thrown caution to the winds when Crusading. However, their latest endeavor has left one of their number in great pain with no obvious cause.
When Apple Bloom has her injury treated, she realizes that things in her life aren't what they seem. And when she learns the truth...
Some things are hard to deal with. But the love of a family can fix a lot of problems.

Edit: New cover art by Inkheart7 on DeviantArt.

Mr. Hat and Clogs is a small candy shop owner with a dark past. He can move faster than the sound barrier, destroy mountains in seconds, and is a brilliant scientist and inventor. When one day, he conducts a experiment were he is teleported into Equestria with the strange ability to transform into a pony. Things seem to be going well at first until his presence begins to attract evil spirits. All the while a cat named Yoruichi follows him around.

Bleach Crossover.
Inspired by Dirty Bit's Cuatro.

Kirby is an unknown phenomenon. His powers confused the inhabitants of Dreamland and foiled the plots of evil masterminds. Over all, he's a super tough, pink puff.

After a warp in Kirby's spaceship, he is rocketed into Equestria, where he must adapt to the strange land and find a way to fix his ship, but not before shenanigans ensue...

Cover Art:
Fimfiction: KlutzJellyfish
DeviantArt: http://daschnookle.deviantart.com/

A/N: As Kirby is an enigma, I will be placing it as either 3rd person Kirby, or 1st person for one of the main six. POVs will alternate.

P.S. I'm basing this off of the show "Kirby: Right Back at Ya'!" and "Hoshi No Kaabi"

Scootaloo is a small pegasus with big dreams, one of those dreams is to be even more famous than her idol, Rainbow Dash. To get there, though, she needs to do a bit of growing, and first of all she needs to learn how to fly. A new invention from her friend Doctor Whooves may get her there in no time at all, literally before she knows it.

Cover image from Snapai! http://snapai.deviantart.com/art/Buck-to-the-Future-260010765