Twinkie Pie. Appledash. Rareshy. You know these pairings and may have favorites of your own. But what if every member of the Mane Six were paired with every other member in the same fanfic?! That's what the Combinatorics Project is--an epic treasury of fifteen ships spread across five parallel universes increasingly full of plot and whimsy. Can you guess which couple is which?
* The angster and her secret admirer
* The burlesque showmares
* The celebrity marriage
* The commune farmers
* The curse victim and caretaker
* The dessert caterers
* The hopeless homebodies
* The industrial mavens
* The mad scientists
* The masquerade hosts
* The model train overlords
* The multiversal adventurers
* The orchard grafters
* The rivals in love
* The weather aficionados
Plus: Twilight blows up like a balloon and goes out to 'have a spicy time'! Applejack and Rainbow Dash are competitive about everything! Rarity dresses like a butterfly--and later in five outfits at once! Pinkiezilla crushes a miniature town and argues with Octavia about her instrument! Fluttershy dances with an angel and keeps a weather diary! Derpy tells a six-word joke! Not everypony ends up happy, but most do! A little suspense is a good thing. Bitter sorrow! Transcendent joy! Probability cupcakes are cupcakes that cupcakes!
Note: This story was written during Season Two, so a few small things are out of date.

To prove she's ready for more responsibility on the farm Apple Bloom decides to raise her own tree, with no help from the rest of her family.

What brought Rarity and Applejack together, nopony knows, but you can bet your last barrel of cider that nothing this side of Discord could separate them.

An ongoing series of slice-of-life snapshots. This barn here'll be clop-free, y'all got it?

These stories are in continuity with Luna's Librarian and If the Flight Suit Fits.

All chapters originally written as separate entries for flash-fic blog Thirty Minute Ponies (TMP). Many thanks to TMP for inspiring me to write!

Lift Carefully - Applejack and Rarity hatch a plan to 'help' Twilight by stealing her journal. What they discover is more than they bargained for.

Among the Hills a Winding Way - Confused about her feelings for Rarity, Applejack seeks comfort from her apple trees, who are eager to listen.

Torn - Rarity finds a philosophical Applejack irresistible and finally makes her move. Will an old hat be the only thing torn by night's end?

Drama-Induced Audience Apathy - Rarity thinks angsty drama will spice up their love life. Applejack is a bit more practical.

Ejection - Twilight and friends are determined to see Applejack and Rarity separated. How will the lovers cope?

Not Again - Applejack isn't feeling like herself. Can her marefriend Rarity help straighten her out?

The Honorable Thing - One more disappointment for Applejack might be one too many.

The Best and the Worst - Rarity's having problems with her work and her magic - nothing that an attentive and perceptive marefriend can't help with.

Crossed in the Mail - Letters bearing bad news can make a mare say things she might regret. Sometimes it's hard to remember that we don't have to endure life's troubles alone.

Tickets - With Mac gone to Appleloosa and Granny needing ever more care, the pressure mounts as AJ is left to fend for herself. A certain dressmaker's attention to detail may come handy.

Calendar - Some dates are more worth remembering than others.

Suddenly There Came A Tapping - The Cutie Mark Crusaders are on the run, forced to flee, and about to learn something that hopefully won't earn them cutie marks.

A Meditation Upon the Day's Toils, or, 'Bark' - Who's a good little dog? You're a good dog, Winona! Yes you are!

Slow and Steady - Big Mac notices a whole lot more than he lets on.

Tailoring the Conversation - Oh, what wisdom from the mouths of fillies! Especially the ones who've been peeking in the barn at really inconvenient times.

The Quiet Revelations - Applejack has a nice quiet sit on the front porch to think a few things over. Maybe a little too quiet - or maybe it's just right after all.

Answers Above - Rarity has something to ask; for other ponies this would be a formality, but for her, it will be out of this world.

Happily Ever After, Checklist Never Ending, Part 1 and Part 2 - With Twilight Sparkle as your wedding planner, you're in good hooves. Right?

Winter by the Pond - There's something Applejack hasn't been able to ask, and isn't sure if any living pony can make it easier for her.

Diminished Distance - Headed for their honeymoon, Rarity and Applejack find there are still things to learn about each other - things they'll wish they could forget.

Facing Worlds - Rarity said some things she shouldn't have at the latest Apple family reunion.

Subtle Like a Hurricane - A lady never begs, especially when public displays of affection are at stake.

Princess Luna finds more than a friend in her sister's student, and Twilight Sparkle gets a chance to study the moon and stars far closer than she ever dreamed possible.

An ongoing series of slice-of-life snapshots. Expect a castle's worth of clop-free d'aaawww.

These stories are in continuity with The Rustic & The Romantic and If the Flight Suit Fits.

Now featuring cover art by the inimitable Cerraka (formerly xaztein / crenair)!

Almost all chapters originally written as separate entries for flash-fic blog Thirty Minute Ponies (TMP). I highly recommend a visit to TMP if you're looking for some of the best 1000-word gems in pony fiction. Many thanks to TMP for inspiring me to write!

Plan C - In which Cadance learns that Celestia is the chessmaster, and that her backup plans are the most fun of all.

Game, Set, Match - Twilight tries her hoof at arena combat. Victory or defeat, she's sure to end up a winner with this opponent.

Countdown - Luna swore she'd never do this again, but there's something about that little librarian from Ponyville that tests her resolve.

Twilight Hustle - Rarity's heard some steamy rumors about Twilight and gathers the girls to dish juicy gossip.

All the World’s a Stage - Luna had a wonderful evening with Twilight and sang her heart out about it. Oh, and she might have left the door open.

Every Morning After - Twilight and Luna shared a wonderful, magical night; unfortunately, immortal Princesses sometimes forget about thousand-year-old laws which could ruin the mood ever so slightly.

Names - Luna's had many more names and titles than "Mare in the Moon", and Twilight discovers which of them meant the most.

Great Minds Think Alike - Cadance and Celestia's plan for Twilight and Luna comes to a head, slightly off schedule.

Third Time's the Charm - Twilight's Nightmare Night costumes aren't cutting it. Now Luna's in town, and that may change her opinion on what makes a proper costume.

Monster - Ponyville's been through the ringer lately, but whose fault is it really?

Impossible - Luna's having a bad night, and Twilight came all the way to Canterlot to do something about it.

Early Observances - If you're going to interrupt Celestia's sleep, you'd better have a very good reason.

THAT Letter - Luna and Twilight have to tell Celestia how serious their relationship has become, and they decide to send a letter. Surely they couldn't disagree about how to make such a simple announcement - could they?

Your Turn - Twilight and her friends reveal some personal secrets, and Twilight's is life-changing.

Trembling Joyful Whispers- The Big Day is here for Twilight and Luna! Hear the congregation's comments as events unfold.

The Power Vested in Me- The Big Day is here, but Luna and Twilight are so very, very far from ready. Will their fears get the better of them?

Awkward - Twilight and Shining Armor have dinner with their parents along with Luna and Cadance. They'll probably wish they'd ordered takeout instead.

Absence - Luna deals with a thousand years of angst all at once; maybe she just needs a gentle helping hoof to make sense of it all.

You Were There - A quiet night between Luna and Twilight is almost derailed by a lesson in ancient mythology.

Between Sun and Moon - Luna reads a bedtime story with which she is all too familiar.

Postcards from the Edge - Twilight leaves to study abroad for three months; in her absence, Luna has a stack of mail to open.

Insert Princess T into Slot S - Twilight want to be Princess of Something. Careful what you wish for!

Ups and Downs - Newly-crowned Princess Twilight needs flying lessons. Careful whom you ask!

Amethyst Throne - Princess Twilight is pretty sure she's seen these petitioners somewhere before.

Princess Celestia is high and mighty in a lot of ways, motherly and mentor-like in more. But her proteges have almost always been unicorns, with one or two pegasi, and not one earth pony in all of her over 1000 years of life. When Applejack, staying true to her Element of Honesty, even with the Princess, bluntly states that Princess Celestia understands little of what it's like to be an earth pony, the princess realizes the flaw in her understanding of her subjects. Turning to a newly reformed old friend, Celestia begs to be an earth pony for a day. What happens, nopony could have guessed.

The annual Ponyville Flea Market is going on, and Pinkie found a very interesting object; an attachable unicorn horn.

Assuming it's just a joke item, Pinkie buys it, hoping to use it as a method of making the Cakes' Twins laugh. But when she discovers that the horn is fully functional...

Can you honestly ever say you would trust Pinkie with Magic?

This follows the events described in the Cutie Mark Chronicles, with one small change: The Sonic Rainboom doesn't happen like it was supposed to. Six destinies fail to start. But when one door closes, another one opens.

Cover Art by Inspired_Light

This is supposed to be close to Canon, but since history is altered and the characters don't experience many of the events that make them who they are in the show I'm listing this as alternate universe (does that make sense?)
For the same reason I'm listing the OC tag, even though the OCs are the mane 6 living different lives.

Nopony dies, nopony suffers permanent psychological scarring, and no irrational whirlwind romances happen.
If I have inadvertently included somepony's OC I apologize.

Warning: contents may contain Existentialism. The facility used also handles peanut based products and wheat gluten.

After Pinkie Pie Suffers a severe head injury, in her forehead is discovered something that an Earth Pony should not have. This gives answers to where she gets her abilities, especially how she seems to be able to defy the laws of physics. This also explains some of her craziness.

How will her friends handle this, and can she learn to better harness the magic within?

A big shoutout to Aegis Shield for the original idea. I would not have thought of this one myself. You, good Sir, are brilliant!

Cover image by sapoltop on Deviantart. I lay no claim to the artwork. The artwork is his creation.

Ever been bested by a sickeningly sweet pony, specifically one who wields the Elements of Harmony? Are you just tired of love and hope and kindness filling your world? I know I am. Come to the next meeting of Villains Anonymous, where no unjust deed of cruelty goes unrewarded. Discuss your beliefs of disaster and anarchy with your like-minded colleagues, speak of plans for your next big scheme for world domination, or just be a stuck-up jerk. Here at Villains Anonymous, all evil is welcome.

-Discord, The Spirit of Disharmony

P.S., Chrysalis, it's your turn to bring snacks.

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Updated 11/11/12

Seeing as how some of you want me to write more, I'll get on it soon.

Matt "MrBackpack" Mxxxxx has finally gotten his life on track; he's got a job that he loves, a good enough home, a beautiful fiance, and a dog. Little does he know that all of that hard work is about to be threatened by the presence of a very confused and very naked young woman appearing in his fudge-smelling Texas backyard.

Part of the PonyFall Collaboration series