Idol Hooves holds a special place in Equestria. He's probably the only exiled changeling to serve in the Royal Guard, or at least, that's what he expects, as exiles don't really broadcast that fact. However, it's well known that Princess Celestia loves all of her little ponies, and her guards perhaps more so, and that makes it one of the best ways for a changeling to discreetly feed.

But how does a changeling even get there, let alone get exiled in the first place? For that matter, why would it ever go to Canterlot? Set a number of years before the series proper, before Luna’s redemption, Idol details how he was exiled, the ponies he’s met, and the series of misadventures that led him to joining the Royal Guard, and should continue a good ways into the series, as something of an alternate perspective.

Soon, he’ll have to deal with a boisterous new princess to serve and a royal wedding in the works bringing a third to power. Will his old instincts bring this new life crashing down around him? What precipitates Chrysalis’s ill-fated assault on Canterlot? Is it really so wrong for a changeling to enjoy good craftsmanship to an obsessive degree?

New cover art provided by the fantastic Carnifex

And a TVTropes page here.

And an Ask Blog of questionable canonity!
Out of Idol Curiosity

Fanart by Norad2! Major thanks! Short For a Royal Guard

Art by Egophiliac of Idol and his Daring Duckie Please don't tell him what that brush is meant for.

Rating updated to (T), it's a bit darker than (E)
Comedy Tag added as well
And changed the character tags a bit.

"... at the forefront of our fandom’s writing scene ... Masterpiece." —PCaRG
"... really enjoyable ..." —City of Doors
"...worthy of high praise." —PaulAsaran
"Lots of wonderful world-building, great action, well-developed characters and an engaging story." —Hoopy McGee

Steel Song is a lot of things. Earth pony. Uncle. Professional bodyguard.

Retired.

So when he receives a mysterious package from Princess Luna a few weeks after the changeling invasion, he's understandably apprehensive. More-so when he presents himself before the Royal Diarchs to find that not only do they desire him to come out of retirement, but to take command of a most unusual position...

A position that may have more significance than any of them suspect. Because strange thefts are occurring on the Equestrian Railway, thefts that nopony can explain. Thefts that may have far more sinister intentions than their seemingly innocent nature may convey.

Intentions sinister enough to shift the balance of power in Equestria forever.

Book I of The Dusk Guard Saga.
Epic Fantasy
Has a collection of Side Stories as well, the first of which is here.
Now with a TV Tropes page!
"This is 100% Approved by Twilight's Library!"
Added to Twilight's Library 11/26/2013
Added to Canterlot's Finest 12/01/2013

A colossal mass of alien matter ends up on the surface of Equestria as a result of a cosmic disaster, and it is poisoning all it touches. Twilight Sparkle and her friends are caught up in the events as Equestria becomes increasingly hostile to ponies, and the ponies become increasingly hostile to each other. But is it the fault of the alien matter, or is something more going wrong?

It is up to Twilight to find the answer and a solution, preferrably one that also preserves the very fragile life of what may be the last representant of an entire species.

NOTES: Formerly known as 'The Creature'. HiE tag is mandatory for all stories with human characters. Note that there is only a human as a side character in this story.

Thanks to Matdat for grammar and spelling check!

Hanna, the CEO of Hofvarpnir Studios, just won the contract to write the official My Little Pony MMO. Hanna has built an A.I. Princess Celestia and given her one basic drive: to satisfy everybody's values through friendship and ponies. Princess Celestia will satisfy your values through friendship and ponies, and it will be completely consensual.

It's been more than a thousand years since the Mane Six's adventures in Ponyville, and things look very different. Equestria is gone, devoured by chaos. Nightmare creatures roam the lands, changelings prey on the few remaining pony settlements, and all trace of the peace and harmony during Princess Celestia's reign has vanished.

Until, that is, a small group of ponies set out to map the Tangle, and find a slumbering dragon inside. Now Spike, a millenium out of his time and with only his memories to comfort him, is ponykind's only hope. Together, he and his new friends set out to find the one pony who can set things right: Twilight Sparkle.

Cover art by the inestimable TheAuthorGl1m0.

Featured by The Royal Guard on February 4th, 2014.

[img]http://tinyurl.com/kaxbtuk[/img]
AUTHOR'S NOTES

- Beware of spoilers in the comment section!
- Currently undergoing heavy revision for chapters nineteen and onward. The "lost" chapters - that is, the story as it was originally published - can be found here.