Thanks for the brownies, and if the Royal Fanfiction Academy is rebooted, I'd focus on FIMFiction.net, 4chan's /mlp/, and 8chan's /pone/.

The MLP fandom is notorious for this. The crowning pinnacle of MLP legendary goodfic is Fallout:Equestria, and it's popular enough to trump Cupcakes, gaining tons of fanart, tons more of spinoff fanfics, and even an entire Fallout:Equestria general on /mlp/ that was one of the first generals to make the jump to /pone/, beating out both Anon in Equestria and Flutterrape, mentioned in my other reply to this comment. (For the record, there may be occasional Pinkamena threads, but never a Cupcakes general, and often, half the thread or more refers to the actually-canon depressed!Pinkie as Pinkamena instead of Cupcakes!Pinkie.)

The problem here is that there's not much difference in theme between Fallout:Equestria and the legendary badfics Rainbow Factory and Cupcakes. In the two legendary badfics, it's a straight injection of grimdark into one part of MLP, while in Fallout:Equestria, the entire world is fused with the very, very grimdark Fallout universe. The difference between FO:E and the two legendary badfics is the execution- it's set a long time into the future, almost all of the canons are either dead and depicted as pretty much in character plus a few years, justified by maturity in the case of Spike, or justified by something going wrong in thier mind, like Trixie. (At least until the point I've read.) The ENTIRETY of the rest of the world is either Fallout canon modified to fit Equestria's world- and pretty well, I might add- and OCs. TONS AND TONS of OCs, allowing the author to create her own characters. The good thing there is that there are no sues.

In contrast, the legendary badfics focus on the actual characters, and are exexuted badly. However, Sgt Sprinkles and Aurora Dawn got the same kind of fans that FO:E did because they kept the same theme, except not hiding behind Fallout.

So yeah, they aren't teen girls with crushes on the characters, they're teen-to-young-adult guys with crushes on the characters (seriously, they call them "waifus" and "horsebandos" on /mlp/ and /pone/) and a taste for grimdark.

Well, I do believe that that's the difference. Many MLP fans do actually like grimdark things- in fact, reading Cupcakes, Rainbow Factory, and other MLP grimdark fanfiction actually brought me into the fandom.

In addition, the pony fandom started in 4chan, where the fandom was and still is tolerant (ha ha) of such fanfic to the point of it being written there as greentext on a daily basis. The fact that Cupcakes's author is unknown and had to be claimed by Sgt. Sprinkles, and had horrible grammar, points to its being created originally in a comment box for /co/'s MLP general, for a pony thread on /b/, or, later, for /mlp/.

Pattycakes (brought up elsewhere in this thread) probably has a similar genesis, as even now on both /mlp/ and /pone/ there's a "diaper general" for diaper/age regression fetishists, where ponies of various ages are posted wearing diapers and other baby gear in various states of use in various circumstances. In fact, a readthrough of it tells me it wouldn't be out of place posted in that general.

Rainbow Factory, Cheerilee's Garden, and a few other grimdark fics tell me that the early-in-the-genesis-of-the-fandom Cupcakes set a theme for other grimdark fics to follow, and each one existing is bringing fans of such grimdark tales that would love for it to be canon, explaining Cupcakes as a canon hazard.

However, a greater hazard to canon is /pone/ and /mlp/. While they are sticklers for SPaG- you learn to be when the only true content someone can make for a year or two is greentext or CYOA- nobody blinks an eye if a greentext takes a pony out of character, and they have no qualms about self inserts somehow appearing in Equestria. The pinnacle of both is "Flutterrape"- a general consisting of greentext where Fluttershy is thrown so out of character that the general has to define what the Flutterrape Fluttershy is supposed to do in the OP- and "Anon in Equestria"- a general about Anonymous, which is a self insert sue designed so that anyone reading the fic can simply say it's themselves, landing in Equestria via various means, including magic portals, suicide (yes), and magic teleportation spells gone wrong. Many greentexts don't die anymore when the thread dies either- they are capped (screenshot) or copied into Pastebin first.

And we wonder why MLP is in so much canon danger.

I'm not sure how you couldn't find the song, WoodenToaster/Glaze is a pretty big artist. He's also known for Avast Fluttershy's Ass- a remix of Avast your Ass by Kitsune²)- and Beyond her Garden- which pretty much takes the record for the most remixed/covered song I've ever seen.

You were looking in Youtube, right?

Here it is! Despite its totally sinister lyrics, it's actually pretty catchy.

Yeah, I may return to the board someday. In the meantime I may pop in unannouced and comment on something, watch for the name "Anonymouse"...

I sure hope I will. You take care as well.

Will do. Thanks for the cake :D

Yeah, I've heard of Pattycakes, but if it's a legendary it's a more classic legendary without fans and fanart.