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.

Featured on Equestria Daily.
Review by PaulAsaran

An Evil Lord learns of a forbidden spell that will destroy the world. Naturally, he intends to cast it.

No problem! Princesses Celestia and Luna will just send Twilight Sparkle to go stop him. That usually does the trick. There's only one catch:

There are only thirty seconds left to stop him before the spell is completed.

Inspired by Half Minute Hero

This story is a sequel to The Celestia Code

When the monsters created by the dark crystal engine escape their prison, it's up to Princess Twilight Sparkle to deal with them. She gets help and advice from Princess Luna, but things don't go as planned. In fact, when a pony who relies on logic and rationality tries to navigate the stormy seas of emotional entanglement while simultaneously saving Equestria from a horde of evil creatures intent on destroying everything they encounter, nothing goes as planned.
AUDIOBOOK by VisualPony
WARNING: Major spoilers in the comments.

Book 2 of the Alicorn Adventure series.

Goodreads Page
100% Approved by Twilight's Library!

The Badass Twilight tag applies more than ever, but please note the new tags.

This story is a fairly direct continuation of The Celestia Code. You might be able to follow it without having read The Celestia Code first, but it's better if you do.

The sequel is here: The Twilight Enigma

Most excellent pre-reading/editing done by the erudite AcademicPony and the dapper statoose!

Have you ever seen a pony that just seemed out of place? Perhaps some mannerism, some behaviour that just struck you as odd? Some piece of clothing that didn't seem quite right? perhaps a coat or mane whose colour just seemed flat-out weird. A strange build, a strange voice, or maybe they were perfectly normal, except that you swear you just saw the exact same pony not five seconds ago somewhere completely different?

Of course you have. Everypony has encountered an Outsider at some point. But never up close, it's always at a distance, and they're always gone before you have the chance to challenge them.

But sometimes the rules get broken. Sometimes fate gets distracted for a moment, and a lone unicorn mare gets to see something that she was never meant to see.

Twilight Sparkle's day is about to get very weird.

FAQ and Supplemental Materials (Potential Spoilers for new readers)

Featured! Twice!
...I really don't know what to say!

Special Thanks go to Horizon for initial proof-reading, editing, and signal-boosting, provided as a prize for spotting an Easter egg in his story Hard Reset II. Seriously, it's an awesome, brain-warping story and you should go read it right now.

Thanks also go to my editors for putting up with my atrocious grammar and spelling errors - Ganelon, Ephraim Blue, BronyWhooves, Commonancestry, Princess Autumn Forest, and Morning Sun

Cover art credit goes to EMedina13 and tamalesyatole. I am looking for more appropriate art, so If you think you can do better, let me know.

"How could somepony as amazing as you not have a Special Somepony on Hearts and Hooves Day?"

With that single sentence, a thousand memories came flooding back to Cheerilee. A thousand memories of a thousand terrible dates...

Princess Celestia went out for a stroll to a coffee shop. The next morning, she is single-hoofedly destroying the coffee industry.

How?

No really, how?

Scootaloo may just be the world's most unfortunate filly. She gets the short stick on everything. Of course, it just so happens that that short stick will always entail dying. It's a good thing she doesn't seem to notice that she dies a lot, otherwise things might start to get a bit complicated.

Short vignettes which reimagine each episode of MLP such that Scootaloo dies in increasingly spectacular and insignificant ways. Updates twice a week, every Tuesday and Friday.

Deciding that Fluttershy did such a great job with Discord, Celestia sends King Sombra, Queen Chrysalis, and Gilda to Ponyville to be cured of their villainous ways. All of this as Ponyville runs to win 'nicest village of the year' award for the thirteenth time running, while trying not to win the 'most disaster prone village of the year' award. Discord couldn't be more amused.

It's a hectic time for the mane six and a terrible time to be the mayor of Ponyville.

This story is a sequel to Odrsjot

Rainbow Dash and the Noble Jury fly east.