One's a play-by-the-rules robotic cop and the other's an adrenaline addicted Rainbow Dash, together they fight crime!
Rainbow Dash doesn't need foalsitting, she's a good cop, but she does tend to be reckless when it comes to procedure, so The Chief assigned her a partner to make sure she doesn't blow anything up. He is a robot designed by Twilight Sparkle named Spark.
Rainbow Dash is determined to be awesome, and Spark just wants to do his job.
The financial adviser for Sparkle Industries was murdered, and the pair is sent to investigate. Is this just a deranged serial killer, or is there something more sinister going on?

Warning: Contains some gore and over-the-top action sequences starting on the second chapter, also has really soft social science fiction and pop cultural references.

Fluttershy has always believed no situation is hopeless. When she meets an unfortunate orphaned unicorn foal, cursed with an evil shadow that haunts him, she might have just met somepony she can’t save.

Notes: This story was written for The More Most Dangerous Game Contest prompt “Past Sins”. I am rating it teen because much of the story will have a dark and sad tone and there also will be some violence.

The cover art is by me.

Sequel is coming in March/April 2015 and will be a Dark Adventure story. It will be the first of a Dark AU Adventure Series focusing on different nations and magics touched on in MLP.

I wish to give a big thank you to both of my editors for finding all of my mistakes and for their criticism that helped me improve various aspects of this story. Thank you Murder Knight and Marcibel!

Subject #42 Class 9 Anomaly

Sex: Male?
Height: 6'2"
Weight: N/A
Eye color: Variable
Hair color: All
Mental State: Compromised

Have you ever felt like you didn't belong in this world? What if you didn't?

Follow Luna, Rarity, Celestia, Rainbow Dash and many more beloved characters as they are whisked into the shoes of the characters from Halo's The Mona Lisa. After salvaging a dying prisoner from Halo's debris played by Lightning Dust, the Ponies of the UPSC Red Horse are left curious and hungry for answers. Commander Princess Celestia and the AI Discord order Sergeant Luna and a squad of seventeen Ponies to investigate the ship Lightning Dust came from: An abandoned Prison Ship known as The Pony Lisa. So what happened on board The Pony Lisa? Did the Griffins playing the roll of Covenant take her over? Or was it just a prison riot? The answer is far more disturbing than anypony could have imagined. Whilst finding a few survivors on the way, and Luna fighting a separate battle in her head, the dwindling squad must push through a horrific infestation and destroy The Pony Lisa's nav systems to stop the evilest thing in the galaxy from locating colonised worlds.

Fluttershy is going through the battle of stress. The country of Saddle Arabia has proposed war and Celestia is desperate to find a way not to fight. One day, when Twilight and her friends were at the castle, the king of Saddle Arabia came to propose a compromise. He said that if there was a willing ellement, willing to leave the country, to marry his son and take over a queen with him when the time came, he would not have any war. The element, however, had to also never leave the country until a second heir was born. Twilight just yelled at the stallion which got her in trouble with Celestia, Rainbow tried to punch him but was held back by Apple Jack, Pinkie Pie didn't even know what was going on, Apple Jack refused because she would rather help take care of her family, and Rarity did not want to even go because of the "Lack of fashion." That left Fluttershy who had no major responsibilities. Fluttershy was given a week to decide in which she made the decision to do it. Her friends were not very happy that she would be leaving but knew that it was for the best...

Story inspired by the picture by Fluttershy 3.

A thousand years after the Princesses disappeared from Equestria, Twilight Sparkle meets a lost Cloudsdale scout named Rainbow Dash. Together they look for a way to end the thousand-year night and dispel the darkness that has spread across Equestria.

Edited by Pascoite
Contains fairly mild grim-dark. Inspiration taken from the Dark Souls games, but it's not strictly a crossover.
Chapters titled "Arc #: Chapter Name" are part of the main story. Chapters titled "Character: Chapter Name" are one-shots about other characters, set in the same world, and aren't necessary in order to follow the main story.

For several years now, the winters in Canterlot have been too warm and dry for snow even to think about falling. And this year is now different.
But it doesn't stop Derpy from dreaming. But there might be a way for her to finally get that white Christmas that she's been dreaming of for so long now.
The question is: will it work or will it go horribly wrong?

Rated teen for drug references
Non-Christmas cover art because I couldn't find one that I liked enough

The sequel to this story: Sweetie Belle and the Quest for Knowledge is now available!

When Sweetie Belle finds a mysterious artifact of a now lost civilization, how will she come to terms with the wealth of knowledge it provides? It says it can be ignored, it says it will never try to influence her, but can an artifact of such power really be so harmless?

Book I of III

Prologue and Chapter 1: Thanks to TheOtherSideOfFluttershy for pre-reading and editing.
The whole story: Thanks to RaylanKrios for editing.
Chapter 4: Thanks to AuthorGenesis for editing.
Epilogue:
Thanks to Malefactory for editing.

This story is a sequel to Sweetie Belle and the Tablet of Knowledge

Sweetie Belle struggles to find a place between her ordinary life and the extraordinary one she just lived. At first, her friends and family are willing to "humor" her magic and science research she begins as a hobby, but they are forced to act when it starts to consume her social life and affect her mental health.

Lyra—a bit of a conspiracy theorist with an attraction to the occult—was otherwise a completely ordinary pony. With a recent discovery of ancient "precursor" technology and possible government cover up, however, she finds life has becoming far more interesting as she searches for the truth.

Book II of III

Cover art by me! See more of my art on my DeviantArt Page!

Thanks to Malefactory for editing.

"If I hadn't blown the whole thing years ago, I could be flying up there right now. With her, with them, the Wonderbolts. But... would I be better off for it?"

After being expelled from the Wonderbolts Academy, Lightning Dust traveled around Equestria in search of herself. Then, many years later, after a hard day of working she went to a bar and ran into the last pony she ever expected to meet again.

Who is jealous of who, though?

Written for the Everfree Northwest 2015 Iron Author Competition