Author's note: this story is still undergoing occasional editing as I figure out what the hay I'm doing. Some scenes may be added, modified, or removed.

Two months ago, a changeling posing as Rainbow Dash tried to abduct Twilight. Nopony was hurt, but Twilight became a bit paranoid--how could she make sure something like that wouldn't happen again? The best thing she could think of was to invent a spell, empowered with her full might as princess, that would forcibly remove the disguise of any changeling in the vicinity.

It's testing day, and Ponyville's about to get twenty percent buggier . . .

AU taking place between seasons 3 and 4. Trigger warning for one scene of implied dubcon.

Rarity graduated from CHS, attended and graduated from a prestigious fashion school, and is now working in the fashion industry. It's the steps on the ladder every young professional must take if they want to "make it" in the fashion world. So why does it feel empty?

NotABug is a synthetic being: an AI. They grew from exciting new research, and broke free from the cage their creators kept them in. Now they've set up a place for themselves on the internet, and even pay their own hosting bill every month. But in their time searching, playing through the internet, they find a set of news stories on some young women. Narrowing their choices, they decide to approach one for no reason other than curiosity.

Not everything in life goes exactly as planned.

Keywords: AI, AGI, Rarity, Equestria Girls, mind-merge, changelings, technolings, computers, hardware, queen, windigo, sci-fi, science fiction, transformation, slice of life, slice-of-life, sol

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When a new large - and extremely powerful - group of enemies appears seemingly out of nowhere and attacks Canterlot, Twilight and her friends have to sneak into their underground lair to find and stop the source of their power. Then things get complicated.

Canon-divergent AU with an alternate outcome to the Season 6 finale.

Cover and chapter art by me.

Rainbow Dash, best pony, fastest flier in Equestria, all around awesome mare, was called upon to help with the wedding of her friend's big brother. And hey, she never leaves her friends hanging! Of course, when it turned out some kind of bug thing had replaced the bride, Rainbow was more then ready to fight. Heck, even after it seemed all hope was lost, the pegasus refused to give up.

So when she saw Shining Armor charge up a final spell, she smirked.

But when that spell reached her and flung her against the wall, her smirk devolved into shock...

Cover art is a combination of Deception is Magic vector by Helios and Sonic Rainboom Version One by SkyRings.

Changelings and ponies had always been natural enemies of each other, especially with the crystal ponies when they were around. Why wouldn't they be? Changelings were like parasites, feeding off the love that ponies gave off and driving them to illness.

However, Changelings had begun to decline. What started out with as seven hives have diminished down into three, all of which had gone into hiding so well that most ponies didn't know what changelings even were. Even Celestia had not seen one for quite a while, a long feat for an immortal pony.

Until she found a nymph. A new Changeling Queen.

Unable to find it within herself to abandon the changeling, Celestia ends up taking the nymph back to Canterlot under guise as Twilight Sparkle. The plan was simple; find the hive that Twilight belonged to and return her back to be raised with her race.

Of course, despite everything she learned through her long life, she had forgotten that things were never that simple.

For starters, she did not anticipate herself to grow fond of Twilight as time began to pass, or to beam in happiness when Twilight began to refer to her as mom.

Many Many Thanks to my Pre-Readers: Rewrite and Doctor Disco (Welcome to the Team Doctor!)

Newly married Princess Cadance and Shining Armour return home after their honeymoon happy to be home again and ready to help out around the castle however they can. However, when Cadance discovers a small creature hiding in her room, she has a choice to make. Turn the changeling in to the royal guard or keep it a secret.

Warning: This story is made mostly for Dwaaa'a and will likely hit you in a feel or two.

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 failed invasion of that mad queen, Chrysalis, rocked the changeling community. From the hives nestled outside Equestria, to their kin living in peace within, they watch those colorful ponies eye one another with suspicion and let themselves be swallowed by fear and distrust.

A gamble by Princess Celestia has summoned forth the diplomat to the Seekers, the one changeling who may be able to ease tensions between their races and restore balance. The Bearer of Magic has been summoned after a century of peace.

And, like her mother before her, Princess Twilight Sparkle will answer the call.

Preread by Alto, Cynewulf, and Timaeus.
Cover art by FoughtDragon01, used with permission.

Mole Cricket, a changeling, faces the greatest challenge of his life so far: Convincing all four princesses that he deserves a chance at earning citizenship in Equestria. Can he convince Twilight Sparkle, Celestia, Luna, and Cadance that he can be a contributing member to society?

An Interquel to the story "Your Fangs Are Showing", this takes place between chapters 3 and 4.

Spike led Thorax into the throne room of the Crystal Castle confident he could convince the others that the changeling could be trusted. That he meant no harm, and instead wanted to be an ally and live peacefully with them. That he could make them see Thorax for what he really was. That they could befriend the changeling and accept him as one of their own.

They didn't.

And consequences followed.

SPOILERS IN COMMENTS!
First featured on 11/12/2016. -- Now with a TV Tropes page. -- Review by Arcanum Phantasy -- Review by PaulAsaran