A ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fan fiction by ezra09. It is an AlternateUniverseFic that takes place in an Equestria where Air Ships were invented, and SkyPirates are everywhere.
After losing her family fortune, Rarity, along with her best friend Pinkie Pie, turns to piracy to make ends meet. The two of them commandeer a magical airship and kidnap the princess's personal student.
When Princess Celestia learns of Twilight and Applejack's abduction, she doesn't agree to pay the ransom. Instead, she hires the sky's greatest tactical mind, the Daring Swordspony Rainbow Dash, and her sidekick, Fluttershy. Together with Shining Armor, they track down Rarity's ship in order to save Twilight. As the two groups engage in a game of cat and mouse, more dangerous threats slowly bubble to the surface. Aztec Curses, angry gods, and a mysterious figure known only as the Derp Pirate Roberts.
Can be read [[http://www.fimfiction.net/story/60052/upon-a-falling-feather over here]].
!!This Fan Fic provides examples of:
* AnchorsAway / CarFu: [[spoiler:How Dash distracts the ''Falling Feather''.]]
* AdventurerArchaeologist: Daring Do, as always.
* [[AFatherToHisMen A Mother To Her Men]]: Rarity and, to a lesser extent, Rainbow Dash.
* TheChessmaster: Rarity. [[spoiler:And Princess Celestia.]]
* CastingAShadow: The Shadowbolts, naturally.
* ClearMyName: Shining Armor has to do this after [[spoiler: the Shadowbolts impersonate him and attack Cadence]].
* ConfusionFu: How Pinkie Pie fights. It's highly effective.
* ConvenientEclipse: Villainous version. Lampshaded.
* DisproportionateRetribution: The Dread Pirate Derpy is on a hunt for the stallion who stole her muffin. Not, contrary to what some readers thought, an euphemism for her daughter. An actual regular muffin.
* EldritchLocation: The Amaranthine Tempest, a massive storm that's been ongoing for over 1200 years.
* [[HumanoidAbomination Equineoid Abomination]]: The Shadowbolts.
* EverythingsBetterWithSpinning: How non-unicorn swords work.
* FalseFlagOperation: [[spoiler:The Shadowbolts disguise themselves as Shining Armor and then attack Princess Cadance.]]
* GambitRoulette: [[spoiler:Celestia is implied to have orchestrated events to cause the current situation just to bring the mane Six together, and some of them are quite difficult to predict. Among other things, she planted Big Macintosh on Rarity's ship, predicted where Daring and Braeburn were going to be, and Spike stowing away, possibly.]]
* IdiosyncraticEpisodeNaming: All the chapter titles form rhyming couplets, InTheStyleOf a Pirate Song[=/=]DrunkenSong
* IndyPloy: Rainbow Dash's specialty.
* InformationBroker: The gryphons, since they run the postal service.
* LeaningOnTheFourthWall: Pinkie, of course. For example, when the story finally updated after a long hiatus, she suggests a recap to get everyone up to speed.
* LeftTheBackgroundMusicOn: In the beginning of the first chapter, readers may assume the interspersed song lines in italics are just there to set the mood. Until Rarity asks Pinkie to stop singing sea shanties.
* MasterOfIllusion: Trixie.
* MrFixit: Flim and Flam.
* NoOneGetsLeftBehind: Rainbow Dash again, although only for her own crew.
* OhCrap: Rainbow Dash and Iron Will when they realize the only way they'll get paid for their services is to help fight Nightmare Moon.
** There's one both ways when Rainbow Dash and the others realize that the prisoners they've been tricked into helping free are Rarity and Pinkie, who they helped lock up in the first place.
* PirateGirl: ''Upon A Falling Feather'' has a cast populated entirely by MLP's main and secondary characters, most of whom are female, so several pirates are female - primarily Rarity (a noblemare forced into the position), Pinkie Pie (who embraces the role completely) and Trixie (who has a minor role and mostly acts like herself).
* PlotCoupons: The seven pieces of eight Daring and Braeburn are tasked to find.
* ReadingTheEnemysMail: Recurring plot point
* ReverseMole: [[spoiler: Big Macintosh was planted in Rarity's crew by Celestia as part of her plan to defeat Nightmare Moon.]]
* RunningGag: Don't call Daring "Miss Do."
* SealedEvilInASixPack: Not only is Nightmare Moon's essence sealed in the moon, but her physical body is sealed aboard the ''Midnight Moon''.
* ShoutOut: Several to ''Film/ThePrincessBride''
* ThirdPersonPerson: Trixie and Iron Will retain this trait.
* TragicVillain: As indicated in the summary, Rarity, who only became a pirate to try and restore her family name and fortune. It's hard not to feel sorry for her [[spoiler: when she's caught and facing the gallows.]]
* TrueCompanions: Rarity and Pinkie, Dash and Fluttershy, Twilight and Applejack
* WholePlotReference: To ''Franchise/PiratesOfTheCaribbean'', along with some elements of ''Film/ThePrincessBride'' and ''VideoGame/SkiesOfArcadia''.