* BileFascination: One reason why it's so popular.
* CanonDefilement: So, so much.
* CreepyCute: Pinkie Pie, of course! [[spoiler: But who could forget Apple Bloom]]?
* CrossesTheLineTwice[=/=]RefugeInAudacity: If your stomach is strong enough, this fanfic looks [[SoBadItsGood so over-the-top itís pretty hillarious]], especially when [[spoiler:Pinkie Pie starts making morbid jokes]].
* EpilepticTrees: "I don't make the rules." is the only significant hint that [[DemonicPossession something else besides Pinkie Pie is in control of her body]] and committing the murders:
** SplitPersonality: A murderous alter-ego is in control of Pinkie's body.
** PuppeteerParasite: Pinkie's brain was infested by parasprite larva.
** CriminalDoppelganger: The killer is a changeling.
* HarsherInHindsight: One episode of the actual show involves Pinkie Pie having a psychotic break and being in a room alone with Rainbow Dash. The fic became more disturbing thanks to that coincidence.
** Naturally, this one ('Party of One') is relied on for the trailer.
** "Green Isn't Your Color" becomes... unsettling after reading this fic. The creepy stalkerish thing is bad enough, but she also threatens Twilight Sparkle by taking a bite out of an apple. And shortly afterwards we're treated to a closeup shot of cupcakes. Brrrr.
* HypeBacklash: Some people slept just fine after reading this fic.
* HilariousInHindsight: Albeit moreso in a GallowsHumor sense, [[http://www.youtube.com/watch?v=zKvSvvOwbTQ this video]] was made two years before ''Cupcakes'' was ever written. People have seem to take notice in the comments.
** There's a pony named Cupcake, who [[MeaningfulName loves cupcakes]], in the toy line. She's one of the older ponies, if not the oldest, to be in every generation.
*** Not to mention that Mrs. Cake's first name is "Cup"
** There's also [[http://www.youtube.com/watch?v=zayZL2UK9HE this scene from 'Call of the Cutie']] where Applebloom warns Scootaloo not to eat a cupcake.
** You know it's implied that Pinkie turned Luna into cupcakes? Well, even though she was pretending, we saw [[Recap/MyLittlePonyFriendshipIsMagicS2E4LunaEclipsed how scared of her Pinkie could be]].
** [[http://www.babble.com/best-recipes/13-my-little-pony-recipes-for-your-little-brony/ This webpage]] features a recipe for Rainbow Dash cupcakes.
** ''Cupcakes'' itself predates a certain horse meat scandal.
* ItWasHisSled: The fact that this story was "Grimdark as Fuck" was intended to be a big twist originally. Seeing how this story has been mentioned all over the internet and the fact that it is labled as "Grimdark as Fuck" that twist has long since been spoiled.
* InternetBackdraft: Just the simple mention of this fic in some parts of the fandom can cause enough bile to fill ten olympic-sized swimming pools. Bonus points if you say you [[LoveItOrHateIt like/dislike]] this fic for any reason.
* LoveItOrHateIt
* MagnumOpusDissonance: Of a sort. The author appreciates all the fanart, AU's, and general publicity, but would prefer some attention for his non-grimdark and more respectable works. Since his name is almost always associated with his infamous fanfic, it's not likely.
* MemeticMutation: The fanfiction was so notorious within the fandom that it even got its own ''confirmed'' Website/KnowYourMeme [[http://knowyourmeme.com/memes/cupcakes-my-little-pony-fanfiction article]].
** The mental imagery caused by the basic premise of the plot itself, the shocked/disgusted/horrified reactions to the fanfiction being spread around by fainthearted readers (or at least those who have heard of it but haven't read it yet due to fear of being scarred and traumatized for life) across the Internet and the various fan arts it gained had made the fanfiction appear much worse than it actually is.
* MemeticPsychopath: This fic is single handedly responsible for turning Pinkie Pie into one.
* MoralEventHorizon: ''Take a wild guess''. The premise is morbid enough that [[CanonDefilement it may taint one's perspective of the real Pinkie Pie]].
* {{Narm}}: Besides Pinkie's happy-go-lucky outlook throughout the story, there are several spelling and grammar mistakes as well (a revised edition is included in the link provided on the main page).
* NauseaFuel: Do not read this fic if you've eaten or are planning to eat anything today.
* NeverLiveItDown: It seems that Sargesprinkles will forever be associated with this fanfic
** And Pinkie's reputation among fans will in turn always be hit with association to this story.
* '''NightmareFuel''': It starts out quietly, but when the {{gorn}} hits, it freaking ''[[PlayerPunch hits]]''.
* NightmareRetardant: For those frightened at the idea of Pinkie Pie going insane and murdering her friends, [[Recap/MyLittlePonyFriendshipIsMagicS4E12PinkiePride Cheese Sandwich]] has proven himself to have superior partying/reality-bending powers than Pinkie Pie. Thus, he could overpower her to save her victims. Maybe.
* RonTheDeathEater: Take a character who is not only a hero, but a nice character overall, though somewhat bubbly, and make her the extreme opposite, though still technically who she is, just insane, and bam, you've got Pinkie in this fic.
* SeinfeldIsUnfunny: [[http://bronies.memebase.com/2011/11/07/my-little-pony-friendship-is-magic-brony-rainbow-factory-album-art/comment-page-1/#comment-108481 Has actually been evoked]] when comparing this fic to later grimdark fics.
* SoBadItsGood
* {{Squick}}: All of it, but most DEFINITELY [[spoiler:the part where Pinkie Pie SQUEEZES RAINBOW DASH'S INTESTINES TO GET RID OF THE BODILY FLUIDS INSIDE THEM!!! Oh and Rainbow also pisses herself twice.]]
** How could you mention that without mentioning the fact that Pinkie [[spoiler:FLOSSES HER OWN TEETH with said intestines!?]]
* TheWoobie: You really can't help but feel horrible for poor Rainbow Dash.
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