What are the chances your favorite pony was secretly a changeling all along?

Yeah, probably about one in one.

There's a crime wave gripping the sleepy town of Apple-Morepone, and nopony on the City Watch seems to care. Corporal "Rainbow" M. Dash naps through her patrols, her partner Dobby is an infamous kleptomaniac, Captain Rhymes is a drunkard, and the entire Watch is a group of burnt-out misfits.

They're about to meet a batpony (adopted) by the name of Carrot, visiting town to return an overdue library book.

And none of their lives will ever be the same.

A crossover/homage to the "City Watch" books of Terry Pratchett's Discworld, written to be readable without any familiarity with the series (though they're excellent, and if you do read them you'll catch my Pratchett in-jokes).

Winner of Aragon's "Comedy Is Serious Business" Contest! "I was quoting this offline for days, forgetting where I was remembering the lines from. … This story made me legitimately jealous, both of its cleverness and of its funniness." –Contest judge MrNumbers

Rated ★★★★★ by Louder Yay! "The best comedy I've read in a long time."

"Highly Recommended" by Super Trampoline! (Video review here @ 09:17) "It's 13,000 words long, but it doesn't feel long, because so much fun stuff is happening."

Reviewed by Ghost Mike! "It features meticulously laboured-over prose, rhyming with actual metre for Zecora, perfectly-timed jokes and reveals that are often outrageous, a sneakily clever plot and character investment that works its magic throughout ... This is a phenomenally executed piece of work."

Other reviews: Present Perfect | City of Doors

Thank you to Themaskedferret and Caliaponia for prereading, and GaPJaxie for motivation/inspiration!

For a thousand years, there was just Celestia. Then Cadance appeared, Luna returned -- and now Twilight has ascended. There are ponies who are very curious about just what happened, why -- and how. Especially the how. Twilight herself is on that list, a freshly-minted princess with far more questions than answers, about to face a brand new one: what truly makes an alicorn?

And what happens if it goes wrong?

(Part of the Triptych Continuum, which has its own TVTropes page and FIMFiction group. New members and trope edits welcome.)

Now with author Patreon and Ko-Fi pages.

Cover art by Harwick.

[Complete! With TVTropes apparently!]
Also, apparently, an animated trailer.

In a world of brass and steam, Twilight Sparkle had thought she had made a life-changing discovery with the invention of the telescope. For better or worse, she was correct.

Now her discovery has not only changed her life, but the lives of those she seeks out in her desperate attempt to contact the only other creature as lonely as Twilight herself.

It all would have been much simpler, but it had to be the one Twilight could only call The Mare on the Moon.

Decidedly not within walking distance, then.

[Featured on EQD before story was meant to be submitted. 4/03/2015]

[Editing team: Southpaw, Wolfvenom, Maskedferret, SwanSong and BluePaladin42, without whom this story would be a fraction of its current state.]
[Special thanks to Novel-Idea for the updated cover]

In the wake of the events of "Infernal Machines" and the Nightmare's most pathetic assault on Ponyville yet, Applejack is thrown into an existential crisis, despite her not knowing what the word "existential" means. So when a stranger named Stranger arrives in town, teaching a new way of coupling talent to power using complex machinery, she is quickly suckered in, along with everypony else. Now, it falls to the Most Dependable of Ponies to bring the resulting ruckus down to earth, but can even Applejack's legendary pragmatism stand up to the brain-fizzing horror that is... CONTRAPTIONOLOGY?

Now with a Spanish translation by Spaniard Kiwi!

Spiders. Oh, how I hate spiders. And yet Luna insists on keeping one as a...pet.

Just a little fun story to keep my skills sharp, so don't expect it to last very long!

Spike now harnesses the bloodstone scepter making him the ruler of all dragon kind. Of course he hands it off as part of an important lesson on friendship, right? Naw. He immediately goes mad with power.

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

This story is a sequel to Princess Celestia The Changeling Queen: Stories Behind the Mask

At the Royal Wedding, Chrysalis and the Changelings were revealed to all of Equestria.

But another mask was torn away that day. A mask born for a thousand years. A mask created on one promise. A mask, that has become synonymous, fused, to its bearer.

A mask that when ripped off, causes Twilight, her friends and Luna to question everything they ever knew about the one pony, one very important pony.

At the Royal Wedding, the meaning of the phrase 'Princess Celestia' changes forever.

NOTE: Chrysalis is NOT Celestia!!! That'd be impossible to pull off.

Credits to: Plainoasis for the design of the cover art
Note 2: Original cover art here: https://angelea-phoenix.deviantart.com/art/Contest-entry-Changeling-Celestia-337023552

Pre-read/edited by Zervziel,
Blankscape,
FinalFan,
Courage Fire
Aurora Borealis

Side Stories to this can be found: here.

An audio-reading on youtube up to Chapter 21 is up by StraightToThePoint Studios. I'm aware there are others but this is the nearest complete one: [embed]https://youtu.be/X3eMW673CSY[/embed]

There are also 2 print versions of Princess Celestia:The Changeling Queen. Nonexistent Publications run and Ministry of Image's run.

Contribute to the TV Tropes Page (thanks to Babs_Seed72 for getting it up)