Pinkamina: I don't have a suit made of multiple ponies first of all. I mean, that design is so inefficient. It only takes one pony to make a proper suit! Like this suit I'm wearing right now was all made from one pony, all down to the tie. Very classy.
Her influence on the Nightmare Fuel "Ask a Pony" blogs in general. Pinkamina caused each of her friends/acquaintances to turn into the beings listed below. Pinkamina lead the others to madness and murder.
You know how in Cupcakes, Pinkamena was the cheerful psycho murderer? Scootaloo takes on that role as the above Pinkamena's assistant. She even uses a Nightmare Fuel Coloring Book to relate how she met Pinkamena: Her Abusive Parents and oblivious teacher left Scootaloo convinced that abuse and pain were just her family's way of showing love, so she 'loved her mother more than she ever loved me'. Pinkamena came in looking for her father, whose number had come up in her Lottery Of Doom, and invited her to have more fun living with her.
Rarity became a shut-in after a series of disapperances and rumors of a murderer began floating around shortly after Pinkie became Pinkamena. Her cat Opal then scratches her face and she reflexively kills Opal in response. She then realizes she enjoys the pain and she finds Pinkamena's blog, developing a sexual obsession with how she tortures her victims. She then basically becomes a Psycho Supporter of Pinkie and Scoots, and even more openly deranged than either of them, making a Pinkamena doll out of Opal's skin, cutting herself for satisfaction, and she becomes ecstatic at the thought of her number coming up on Pinkie's Lottery of Doom.
Rarity explains how she got the way she is. At first it's just a flat explanation, but then she gradually slips into treating the Pinkamena doll as if it was the real Pinkamena, loving her back and cutting her up. She even mentions sewing Opal's heart into the doll, so she would know Pinkamena loved her back. She even states herself that the explenation she was giving wasn't the real explanation!
I dream of Pinkamena. Blood. Wounds. Stitches. I had a dream the other night, I was swimming in a red river, and the water was full of little blades that cut me when they swam by.
Rarity decides to enhance that heart-shaped scar on her chest. By branding it.
The artist of the blog, Jay, has promised that the story would gradually move in a more Silent Hill psychological horror direction. Hewasn'tkidding. All of Rarity's scars suddenly open back up, bleeding everywhere. Sweetie Belle bandages her up, but covers her mouth, and Rarity can't breathe. While Sweetie Belle runs off to find Twilight, Rarity coughs up blood and dies. Twilight manages to resuscitate her in time, but not before Rarity has a vision of her Pinkamena doll, staring at her, covered in Rarity's blood.
Rarity is chained up in Celestia's dungeon. She reflects on how much she's changed, and how much she actually enjoyed it. Then she hears a voice. It's the Pinkamena doll. It crawls out of her chest, encouraging Rarity to keep being evil and perverted. The doll, drenched with Rarity's blood, then opens its mouth and makes out with Rarity. With tongue. The worst part? You can't tell if it's actually happening or if Rarity's severely hallucinating.
It's about Luna who has gone insane while on the Moon. Luna speaks in slow, short sentences while talking about what she does on the moon, like how does she eat she eats herself, but as a goddess her parts just grow back or what she does for fun rips her eyes out. The creepiest part is this isn't Gorn, the art is all done in a stylized simple form.
This one focuses on Twilight, at the height of all of her friends going insane or dying. Still needing to write her friendship reports to Celestia, and Spike mysteriously absent, Twilight completely loses it. She also constantly sports her Slasher Smile from Lesson Zero, messy mane and all.
After escaping from being turned into "cupcakes" by Pinkamena and seeing the rest of her friends go insane, Rainbow Dash becomes an extremely cynical and nihilistic rebel who, despite still caring for her friends, does not care what others think and does what she wants, rules or morals be damned.
Applejack, fearing her sister's safety as well as her own after watching her own friends go insane, becomes an extremely paranoid and reclusive shut-in. She relies on excessive amounts of alcohol to calm herself and will not hesitate to shoot anything that steps hoof on her farm.
This blog centers on a Twilight Sparkle that has become so obsessed with knowledge and the desire to 'know' that she started experimenting on her friends and anyone else she got her hooves on. Naturally, this has forced her into hiding. Highlights include Fluttershy turned into a drug addict, Pinkie Pie converted into an Oracle machine, Rarity brainwashed into being her unknowing spy, and operating on Spike's brain and basically turning him into a Frankenstein's Monster.
Can someone please add some more to this? I'm too scared to look further...
It's just a collection of pictures of creepy ponies, the occasional grimdark fanfiction, and a warped version of Smile, Smile, Smile and Hush Now, Quiet Now playing in the background. Best if you turn your laptop down. Otherwise, that's it.
Usually a fairly safe, standard, in-character Tumblr, until someone asks her "Cupcakes - delicious treat, or weapon of culinary disaster?". Gilda's reply is an image of her staring blankly at the screen, until a picture of a dark, bloody, almost Zalgo-fied Pinkie flashes on screen for just a few frames, barely even enough to make out what it is. Gilad then replies "Uh...delicious treat?".
The story on how Bubble Berry (male pinkie pie, for those wondering), started killing people is kinda this too. Especially when in this universe, the Prince knows about it, and allows him to do it too!
The entire concept is Nightmare Fuel: Twilight Sparkle is corrupted by the use of Sombra's dark magic in the Crystal Empire episodes, and she ends up conquering first the Crystal Empire, then all of Equestria.
Scootaloo is turned into a changeling by Chrysalis and used as a front to lure more of Ponyville's ponies into her lair. Very early on, she adds the rest of the CMC to her ranks as foals are easier to turn than adult ponies. This soon becomes a full on invasion plan when She mind rapes Twilight Sparkle into being a powerful and loyal servant, using her magic to assist the takeover of Equestria. Much like the above entry, this invasion is all but totally unopposed and multiple cities and major characters have fallen to the changelings, using the adults for food and the foals to make more changelings.
Garnet's traumtic past is pretty unsettling, especially the Eye Scream bit.
In this universe, Onyx's draining outright kills the victim. For added Fridge Horror, This could very well have been the case with Tirek in the actual show!
More Fridge Horror? The possibility it doesn't and Onyx is simply that psychopathic in this verse that he murders his victims after draining them.
Onyx has barely had any screentime, and yet he is already terrifying due to the childish glee he expresses over murdering innocent ponies.
Worse? When he gets hurt by Celestia. A mixture of what he freaking looks like and his reaction to being injured (it looks like Celestia blew off half his face and shattered his leg). It's hard to tell if he's being like a child and refusing to admit he was injured or if he genuinely feels the pain he is in as pleasurable.
Onyx'sEvil Gloating to a defeated Celestia about how he's going to enslave Equestria. Made worse by the fact he intends to keep her alive and only kill her when he's murdered everypony else.