This story is a sequel to Princess Celestia: A Brief History

  When Celestia first laid eyes on Twilight Sparkle, she knew she’d seen her somewhere before. Though she’d managed to hide this from both Sunset and Twilight, after they departed for the evening, Celestia needed to be sure.
  With her trusted aide Raven at her side and a dangerous threat on the horizon, Celestia heads to the offices of the Equestrian Secret Service to investigate her suspicions.
  Because if she’s right, the possibility of eternal night is the least of Equestria’s concerns.

In FimFiction's Feature Box from October 17 to October 21, 2016 with a Hot tag!

Featured on Equestria Daily on October 23, 2016!

Historian’s Note:
In a timeline where the Sonic Rainboom didn’t happen, The Cloudsdale Report occurs directly after the events chronicled in Princess Celestia: A Brief History, which occur the day after The Application of Unified Harmony Magics.

Cast: Princess Celestia, Raven, Philomena, Twilight Sparkle, Sunset Shimmer

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Design by Amber Spark in Pixelmator
Celestia’s Cutie Mark by BlackGryp0n (Yes, that BlackGryp0n)

Beta Reader Credits
Ebon Quill - Quest Designer on The Manehattan Project
Little Tinker - Master of Systems at Ponyville Live & Scripting Engineer on The Manehattan Project

There are many legends whispered among the ponies of Equestria, but none are stranger than that of the metal man that fell from the stars. Legend has it that the metal man's suit of armor still exists to this very day, slumbering the centuries away in the Canterlot Archives ...

Takes place during the season four finale.

Here's some quick background info on what you need to know, seeing as the 40K universe is huge and no one can be expected to know everything.

The Space Marine chapter involved in this story is a little known chapter known as the Celestial Lions, who are a descendant of the Imperial Fists. They were targeted for destruction by the Inquisition after defying them on an Exterminatus that was due to purge a world the Lions had fought for and saved. They fought during the Third War for Armageddon mainly, and during the fighting, they were reduced from 950+ battle brothers to just 96. Their numbers are even lower now, due to events that will be explored during this story.

Edited and Proofread by the amazing Loyalist. He's seen some heresy.

Featured on 4/26/15 and again on 7/25/15

Princess Luna left some things in the moon when she returned after her thousand year banishment. To recover these forgotten items, the Lunar Recovery Program was created. But on the first launch, something goes wrong. The controls break and the crew finds themselves on a planet inhabited by an advanced bipedal species.

This story is a sequel to A Thousand Voices

"Together, we can build a future greater than any one of us could imagine. A future paid for by the sacrifices of those who fought and died alongside us. A future that many will never see..."

For seven months, Equis was left in peace, and for seven months Twilight Sparkle has waited for the return of Legion. Just as she is ready to give up hope, the galaxy decides it is not finished with Equis. Unfortunately, it does not send someone as patient as the geth...

For the alien civilizations of the galaxy, they fight for their lives against the greatest threat ever known. And when victory is finally achieved, the crew of the Normandy find that their mission is not over just yet.

This story is a sequel to Friendship is Grievous

The brutal Clone Wars have at last come to an end. The Separatists are no more, and from the ashes of the Galactic Republic, the Galactic Empire has emerged. Now, the ponies of Equestria must choose their path through a dark and terrible time.

TV Tropes page.

Cover art by Mix-up over at his his deviantart.

A Metroid Crossover

A meteor, resistant to magical manipulation, crashes in Equestria, Planet Equis, and soon spreads an unknown poison throughout the land. Containment is all but failing and the Princesses have little power to stop the spread of the Great Poison. The Elements of Harmony are of little use as no knowledge exists of this threat that consumes all life. Help comes from a certain Hunter, clad in metal.

Samus Aran will not only fight for her life as always, but her own sanity as well as these ponies that she begrudgingly starts seeing as allies. New horrors and abilities await her as a reason to fight slowly festers within her, possibly unlocking something she had been denied for so long: Friendship.

Notes and Resources:

This takes place after Echoes. The events of Corruption will have not happened yet. In terms of MLP, consider everything up to and including the Crystal Empire. Princess Twilight does not exist here, etc. The official Metroid Timeline can be found here.

As well, this story references the manga in many places. Reading of it is not required and I try my best to explain the context, but if you're interested, both volumes can be found here.

EDIT: This story was written over two and a half years, beginning in 2013. You'll probably notice the difference in writing as the chapters progress.

Ten years ago, the Griffon Empire opened a portal to a strange new world and tried to annex it. In the peace settlement that followed they lost control of the province containing the portal. Since then, the Griffonian Democratic Republic had been completely isolated, surrounded on all sides by a hostile empire. Now, for the first time, a visitor had been allowed.

General Grievous, Supreme Commander of the Separatist Droid Army, conqueror of star systems, and slayer of Jedi. And... stranded on Equestria?

This can't end well.

TV Tropes page.

Now featuring a dramatic reading by LimeyPony!

A human designed colonization probe carrying all the components required to create a colony for the human race has detected a planet within parameters to begin terraformation and colonization. There's just one problem, an unknown radiation covers the land making it too dangerous for humans. The planet itself is fine, but the radiation must be removed before colonization can begin. Meanwhile in Ponyville a large object lands on the outskirts of town. Other objects can be seen flying through the air and orbiting the planet. Twilight Sparkle soon notices something peculiar, something very strange. Something horrifying. Wherever the objects go, magic is removed. This could get problematic.

Following the destruction of the Collector Base, the crew of the Normandy-SR2 go their separate ways. One squadmate, an AI 'Geth' named Legion, is sent by the Geth Consensus to investigate the possibility of a Quarian attack. However, when Legion is discovered and forced to make an emergency jump through the Mass Relay, it finds itself in the most unlikely of places... Equestria.

At the same time, the ponies of Equestria are dealing with their own problems. A mysterious disease threatens to topple pony civilization, while tensions along the border are growing and could escalate into full blown war.

Join Legion in its journey in Equestria to both return to the Geth before the arrival of the Reapers, and to help the peaceful ponies who inhabit the world.

Notice: As of 9/12/2016, this fic has received comprehensive updates to grammar/spelling/sentence structure, with a few minor plot alterations. Enjoy!