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Depiction in the series
Acting like a dogIn The Return of Harmony Part 2, Discord's magic makes Big McIntosh act like a dog. In Read It and Weep, Screwy barks like a hound dog while chasing Rainbow Dash from the hospital.
AllergiesDuring the episode Bridle Gossip, one of the possible causes Twilight Sparkle considers to explain what turns out to be the effect of poison joke is an allergic reaction. In My Little Pony: Friends Forever Issue #32, Daring Do claims to be allergic to spiders but turns out to be afraid of them rather than allergic to them.
Blue fluIn Three's A Crowd, Discord fakes having come down with blue flu due to inadequate "hoof and claw washing" to get Twilight Sparkle and Princess Cadance to care for him as part of an elaborate prank. Among his faked symptoms are cerulean-hued skin and fur, and sneezing that sends the afflicted flying backwards; he additionally casts a random spell on any nearby object whenever he sneezes, such as burning up a tree's leaves in blue flames or blowing away an entire house. Discord claims the disease is highly contagious as Applejack and Rarity become afflicted after he sneezes on them, turning their coats blue within seconds. According to Discord, besides dozens of outlandish treatments, the blue flu can be cured with a magical soothing elixir brewed from a gargantuan "exquisite magic flower" that grows on a hill at the edge of Equestria, picked as it drops its petals at sunset.
Clydesdale fur blight
ColdIn Winter Wrap Up, Spike gets a cold after falling into icy water; his only noticeable symptom is sneezing. During the song in Hearts and Hooves Day, Sweetie Belle remarks that one of Cheerilee's potential suitors has "a terrible cold"; the pony has a reddened nose, blood-shot eyes, a thermometer in his mouth, and a hot-water bottle on his head.
Collective amnesiaApplejack describes the Crystal Ponies' memory loss in The Crystal Empire - Part 1 as "some kinda collective amnesia." Twilight Sparkle and her friends seek out more information about the Crystal Empire so they can use the Crystal Ponies' magic to protect the empire, but find that they don't remember anything. The Crystal Pony that Twilight interviews can't remember anything before King Sombra came to power, and says that although they've been gone a thousand years, Sombra's rule "feels like it was just yesterday." Once the interviews prove fruitless, the ponies head to the library, where they meet a librarian pony who can't remember where the history section is or whether she even works at the library. The ponies find a history book which contains the information they seek and decide to hold a Crystal Faire to "renew the spirit of love and unity in the empire so they could protect it from harm," according to the book Twilight reads.
The Crystal Faire does jog the Crystal Ponies' memories and they recall the Crystal Heart. The librarian remembers that she really does work at the library. By the end of the episode, the Crystal Ponies even manage to recognize that the replacement Crystal Heart that Twilight fashioned isn't the real Crystal Heart, but the real Crystal Heart is eventually restored and the Crystal Ponies' magic protects the Crystal Empire once again.
In Friendship is Magic, part 1, Nightmare Moon is stated to be a corrupted form of Princess Luna, formed from her bitterness and jealousy toward her older sister Princess Celestia. More detail about this is revealed in the My Little Pony: Friendship is Magic Issue #5 story, and Luna's transformation into Nightmare Moon is shown in a flashback in Princess Twilight Sparkle - Part 1.The Alicorn Amulet in Magic Duel blesses the wearer with enhanced magical powers but also "corrupts" the user, according to a book that the main characters find. Trixie, who possesses the amulet and uses it to take control of Ponyville, becomes more and more tyrannical and bitter as she continues to rely on its power. Since the amulet has a lock that prevents anyone other than the user from taking it off, Twilight Sparkle tricks Trixie into removing the Alicorn Amulet by pretending she possesses an even stronger amulet. The aura color of Trixie's magic, which was red before, turns back to pink, and her eyes no longer glow red from the influence of the amulet.
CroupDiscord mentions he may have the croup on top of his faked blue flu during his song in Three's A Crowd, breaking out into flower-shaped spots as he does, and requests a vat of pumpkin soup, silk scarves, warm milk, and "pastries from Abyssinia" for treatment.
Cutie pox"Cutie pox" is featured in the eponymous episode The Cutie Pox, which Twilight Sparkle describes from a book: "This puzzling pony plague afflicted a population of ponies back in the Paleopony Period! Random cutie marks appeared all over the ponies' bodies, causing them to perform all the talents that came with them! The cause of the breakout was never discovered, and the cutie pox disappeared as mysteriously as they arrived!" Apple Bloom contracts cutie pox in the episode after an overdose of Heart's Desire plant petals. The pox is cured by the flower that grows from the Seeds of Truth supplied by Zecora, which sprout only in the presence of a truthful confession.
Cutie unmarkingIn The Cutie Map - Part 1 and Part 2, Applejack, Double Diamond, Fluttershy, Night Glider, Party Favor, Pinkie Pie, Rainbow Dash, Rarity, Sugar Belle, Twilight Sparkle, and numerous other ponies' cutie marks are removed by Starlight Glimmer and replaced by equal signs. Night Glider refers to this as the "cutie unmarking." Some ponies with this also exhibit losing color in their coats, shorter manes and tails, and rather phony, creepy, and exaggerated smiles. As an additional effect, the equal sign that replaces their cutie mark actively dampens a pony's individuality, and more specifically their special talent associated with their cutie mark.
Feather fluA number of ponies contract feather flu in Hurricane Fluttershy. Initially Rainbow Dash accuses Thunderlane of trying to get of out of setting a new tornado speed record with all the other Pegasus ponies when she hears coughing. Afterward, the pony who was standing behind Thunderlane, Blossomforth, coughs too. Rainbow Dash lists off at least seven other Pegasi who contracted the flu, with Thunderlane said to be at the hospital. At one point Twilight Sparkle sprays Thunderlane with an aerosol can of an unspecified substance to create a "germ-free environment."
Greed-induced growthIn Secret of My Excess, after Spike begins hoarding objects and having sudden and dramatic growth spurts, Zecora explains that Spike's greed is making him grow "into a monster." At the end of the episode he returns to normal after Rarity reminds him of his act of generosity towards her when he gave her a gem he had been been saving to eat on his birthday. This affliction is implied to be exclusive to dragons, and a natural part of their biology as opposed to something that Spike contracted.
In The Cutie Pox, Twilight Sparkle mentions that she had been reading about "unusual equine illnesses" in a book entitled 'Perplexing Pony Plagues'. One of the illnesses she mentions is Hay Fever, though she gives no information about it. It is also mentioned in Leap of Faith by Flim and Flam as one illness that their tonic can allegedly cure.
Flam mentions horsentery during Flim Flam Miracle Curative Tonic in Leap of Faith as he shows the crowd a picture of a pony with a tall and bony body structure. Its name is similar to a real disorder called dysentery.
- See also: Changeling infection
In The Crystal Empire - Part 2, Twilight and Spike are hypnotized when King Sombra's magic door makes them confront their worst fears.
In Every Little Thing She Does, Starlight Glimmer mind-controls her friends using the Fiducia Compelus spell in order to complete several friendship lessons at once. In their hypnotized state, the ponies have shrunken pupils with faded colors and speak mechanically.
In My Little Pony Equestria Girls, Sunset Shimmer uses the magic of the element of magic to bring the students of Canterlot High School under her control. The affected students' eyes turn pale green and they moan like zombies.
In My Little Pony: Friendship is Magic Issue #23, the ponies of Ponyville and Spike are hypnotized by the singing of a kelpie named Cassie. The Mane Six's pets, immune to the spell's effect, form a plan to stop the kelpie and release the ponies from her spell.
In My Little Pony: Friendship is Magic Issue #32, Twilight hypnotizes Fluttershy into becoming Flutterbat again.
In My Little Pony: Friendship is Magic Issue #48, Accord – Discord transformed by an astronomical event – brainwashes ponies and forces them to share a common mindset in order to bring "order" to Equestria.
Irrational fearsMs. Peachbottom, who is mistaken for the Equestria Games Inspector in the episode Games Ponies Play, becomes frightened when entering the Crystal Palace because of the high ceilings (altocelarophobia) and smaller areas (claustrophobia). Throughout the episode, she tries to get outside of the palace and ends up wrecking the crystal stadium and almost runs right out of the Crystal Empire with a vase on her head.
Fluttershy suffers from a fear of heights in Dragonshy and stage fright/performance anxiety in several episodes, most notably Hurricane Fluttershy and Filli Vanilli. While some of this is rooted to the bullying she received at flight camp, they remain as everyday burdens to her. In Equestria Games, Spike suffers a similar fear from Fluttershy's, as depicted of feeling overwhelmed by a sheer number of ponies in the stadium. Tender Taps also suffers the same fear as both Spike and Fluttershy, as he's afraid to perform in front of an audience with his tap-dancing talent. Twilight Sparkle suffers from a fear of quesadillas in Party Pooped, and her human counterpart suffers from performance anxiety in My Little Pony Equestria Girls: Friendship Games during the archery portion of the Tri-Cross Relay.
King Sombra's curseIn The Crystal Empire - Part 1, Shining Armor escapes from King Sombra's attack at the cost of having shadow crystals being grown on his horn which nullify the use of unicorn magic. It's only when the magic of the Crystal Heart is restored in The Crystal Empire - Part 2 that Shining Armor is cured. In My Little Pony: Friendship is Magic Issue #35, Sombra seals Twilight's magic. Princess Cadance's magic is also sealed in Issue #37.
Mane and tail loss
PetrificationA cockatrice petrifies Twilight Sparkle and Elizabeak in the episode Stare Master. Fluttershy tries to warn the Cutie Mark Crusaders to never look one in the eye; later she confronts the cockatrice, which manages to partially turn her into stone, but using the Stare, she cows the cockatrice into turning Twilight and the chicken back to normal, and the stone that was partially encasing her shatters. Twilight does not retain any memory of her time spent petrified, as she openly admits to the overjoyed Cutie Mark Crusaders and to Fluttershy.
At the beginning of the episode The Return of Harmony Part 1, Discord, having been turned to stone by Princess Celestia and Princess Luna using the Elements of Harmony long beforehand, escapes after the Cutie Mark Crusaders get into a fight in front of his stone form. Celestia explains that the spell to keep Discord contained broke due to her and Luna no longer being connected to the Elements. At the end of the episode The Return of Harmony Part 2, the Mane Six use the Elements to turn Discord back to stone.
In the third season episode Keep Calm and Flutter On the effects of petrification on the victim are loosely explored upon. After the Mane Six use the Elements of Harmony to release Discord from his imprisonment the latter reveals to them that he had been listening in on Princess Celestia's idea of reforming him. Discord then reveals to Twilight Sparkle that while he was still petrified he had retained his sense of hearing. However, due to the fact that he could not move his body it made "rolling [his] eyes a challenge." It should be noted that it is unclear whether petrification in the case of the cockatrice and Discord's petrification via the Elements of Harmony are connected.
In the fourth season episode, Princess Twilight Sparkle - Part 2, Discord's petrification long beforehand is shown.
In My Little Pony: FIENDship is Magic Issue #1, Sombra turns Princess Amore into a black crystal statue and shatters her. He also turns Princess Celestia and Princess Luna to stone in My Little Pony: Friendship is Magic Issue #35 and Shining Armor in Issue #37.
Poison jokePoison joke, which appears in the episode Bridle Gossip, is a magical plant that causes ridicule-inducing afflictions on the Mane Six who come into contact with it. In the episode, the ponies accidentally stumble into a large patch of poison joke despite warnings from Zecora, which are misconstrued as threats. The plant has large leaves with a bulb with several petals sticking out of the center, each bulb sporting a few stamen. The entire plant is blue, including leaves and stalk, with dark streaks running over it in a design.
Like its namesake, poison oak, it affects the ponies after they merely come into contact with it, but as described by Zecora, the plant does not poison its victims; rather, it plays practical jokes, which manifest as physical afflictions. The jokes in the episode magically match the victim's personality and traits. Spike also comes up with nicknames for the Mane Six's infections.In the episode, the ponies are afflicted with the following:
- Twilight Sparkle's horn becomes wobbly, soft and covered in blue spots. Spike gives her the nickname Twilight Flopple.
- Rainbow Dash's wings become inverted, being upside down and on her lower sides, making her fly funny and crash constantly. Spike's nickname for her is Rainbow Crash.
- Applejack shrinks down to a tiny size and can fit on a pony's hoof. Spike gives Apple Teeny as a nickname for her.
- Rarity's mane, coat, and tail become frizzled, very long, and mop-like. Spike nicknames her Hairity.
- Pinkie Pie's tongue becomes swollen and covered in blue spots, making her speak unintelligibly. Spike calls her Spitty Pie.
- Fluttershy's voice deepens into that of a stallion with a deep and masculine voice, provided by Blu Mankuma in S1E9 and Alvin Sanders and Marcus Mosley in S4E14. Spike gives the nickname Flutterguy for her.
The effects of poison joke are eventually cured when the ponies take an herbal bath for which the recipe is found in a book called Supernaturals: Natural Remedies and Cure-Alls That Are Simply Super, which Twilight initially ignored in the episode because of the first part of its title. Twilight told Spike when she saw that book, "This book is just a bunch of hooey!" but the book did indeed contain the cure.
In Filli Vanilli, Zecora reveals that poison joke effects can be deliberately triggered in a controlled manner by the use of a potion using the blossoms as an ingredient. She then uses this potion on Fluttershy so she can regain her deep voice of Flutterguy so she can use her deep singing voice to help out Big McIntosh when he loses his voice and becomes unable to sing for the Pony Tones.In Daring Do and the Eternal Flower, Ahuizotl mistakes a poison joke flower for the Eternal Flower and shrinks down to the size of a mouse.
Food poisoningSome ponies suffer from food poisoning in Applebuck Season when Pinkie Pie accidentally serves "baked bads" after Applejack's sleep-deprived attempts to help with muffin baking go awry. Nurse Redheart and "Nurse Tenderheart" tend to a number of ponies who are seen squirming and writhing on their beds, many of whom are green-faced and some of whom vomit.
Love poisoningA love potion is created in Hearts and Hooves Day by the Cutie Mark Crusaders and administered to Cheerilee and Big McIntosh. The Crusaders borrow a book from Twilight Sparkle and use a recipe from it to create a love potion, mixing "a tuft of cloud" and a "bright rainbow's glow" and stirring with a Pegasus feather. They trick Cheerilee and Big McIntosh into drinking it, and the two become deeply infatuated with each other. The Crusaders later discover that the drink is actually a love poison, and it makes ponies so "lost in each other's eyes" that they can't do anything else. The antidote is to keep the affected ponies "from looking into each other's eyes for one full hour," which, with much effort, they succeed in doing, breaking the spell.
- See also: Pony flu
In Dragonshy, Fluttershy asks Angel to eat his carrot at a slower pace to prevent him from getting a "tummy ache." Spike is eating ice-cream throughout the episode It's About Time, eventually resulting in a stomach ache. In Three's A Crowd, Discord mentions "[his] stomach's feeling crummy" as a symptom of his faked blue flu. In the episode Maud Pie, Pinkie Pie's friends get stomach aches from taste-testing her various rock candy recipes. In The Cutie Map - Part 1, Pinkie Pie gets a stomach ache from eating a dozen poorly-made muffins.
At the end of Three's A Crowd, a Tatzlwurm sneezes on Discord, causing him to turn green with spots. Unlike Discord's faked blue flu earlier, this illness is real, and it leads to him being quarantined in a plastic bubble in Fluttershy's cottage.
The trotsIn The Cutie Pox, Twilight mentions that she had been reading about "unusual equine illnesses" in a book entitled 'Perplexing Pony Plagues'. One of the illnesses she mentions is "the trots," though no details are mentioned. In the real world, the trots are simply known as a case of very bad diarrhea.
Voice lossPinkie Pie overexerts herself for the June dance, making her voice become very soft. Fluttershy makes some herbal tea to help heal it.
ZombificationIn Bridle Gossip, when Twilight and Spike find the streets of Ponyville empty in the middle in the day, Spike fears that there are zombie ponies around.
In 28 Pranks Later, Pinkie Pie organizes a prank with everyone in Ponyville to teach Rainbow Dash a lesson about her excessive pranking. Her prank involves everyone acting like zombies as a result of eating joke cookies and having their mouths and teeth coated in rainbow colors. These "zom-ponies" walk about slowly and have faded coat and mane colors, dilated eyes, speech limited mostly to low groans and moans, and an uncontrollable craving for cookies.In My Little Pony: Friendship is Magic Issue #16, when Twilight, Pinkie, Rainbow Dash, and Rarity become trapped in an empty book world, Pinkie uses her imagination to create an epic fantasy world, and one of their obstacles is a horde of zombie ponies. These zombies more closely resemble traditional zombies, having rotted flesh and missing body parts.
- See also: Hypnosis/mind control
In the My Little Pony: Friendship is Magic Issue #1 story The Return of Queen Chrysalis, a number of ponies, including Silver Spoon, Bittersweet, Apple Bloom, Sweetie Belle, Scootaloo, Octavia Melody, Sweet Cream Scoops[sic], Lyra Heartstrings and DJ Pon-3, appear with bright blue eyes, tiny pupils and formless expressions. In Twilight's journal, the condition is described as being 'infected' by the changelings. In order to blend in with them, Pinkie Pie leads the other main characters into walking like zombies.
- See also: Pony flu
In My Little Pony: Friends Forever Issue #33, most of Cherry Jubilee's crew "is out with this stubborn equine flu", Sweet Apple Acres "already got hit with the flu earlier in the season", and most of Buffalo Bull's traveling Wild West show troupe "has come down with the equine flu"—Buffalo Bull "got a bad case of that flu." The name comes from equine influenza.
In My Little Pony: Friends Forever Issue #21, the ponies of Ponyville and Zecora fall ill due to eating a batch of fungus-tainted hay. Those infected become covered in red spots and have uncontrollable sneezing fits. When Zecora becomes infected, she stops rhyming and speaks nonsensically.
In My Little Pony: Friends Forever Issue #21, Spike mentions having caught the sapphire flu the previous month. He worried about giving it to Twilight, but according to her, the flu can only be caught by dragons.
Comet Tail's Curse
- See also: Magic#Comet Tail
Comet Tail's Curse is mentioned throughout the chapter book Starlight Glimmer and the Secret Suite. It is stated to be a curse that strips unicorns of their magic if they try to alter another wizard's magic and leave it incomplete. However, it is commonly believed to be imaginary.
Inknorance, according to Twilight in the chapter book Princess Twilight Sparkle and the Forgotten Books of Autumn, is "[t]he magical affliction that affects books and effectively erases knowledge by darkening their pages".
The Sparkle World story The Hero of Ponyville! involves Spike becoming gigantic; however, unlike what transpires in the episodes The Cutie Mark Chronicles and Secret of My Excess, Spike possesses his usual appearance, though on a larger scale. Twilight Sparkle refers to him as a "giant baby dragon" and attributes his enlargement to him brushing against a magic plant. Later in the story, Twilight bathes him with a magic cure and he shrinks to normal size.
In one of the German comics, Twilight Sparkle, Applejack, and Spike discover Pinkie Pie and Fluttershy appearing to be petrified. Twilight reads in a book that when ponies are looking forward to something so much that they can't take the anticipation, they might get paralyzed. She tells Applejack and Spike that the cure is a special cereal with a smell that calms them down so they can wake up, and that this cereal doesn't grow anywhere in Equestria, only being found beyond the Everfree Forest. After traveling to a barley field outside of Equestria, the three of them return to Ponyville with some of the barley and make a campfire with it, which wakes up the paralyzed ponies.
In the Sparkle World story Pony Flu!, Rainbow Dash has pony flu, which gives her itchy spots. A few days later, she has recovered.
- ↑ Jayson Thiessen at the 2012 New York Comic Con My Little Pony panel (2012-10-11). Retrieved on 2012 October 12.
- ↑ Jim Miller (2016-09-08). The Biggest Jerk on Twitter: "@ZahalkaWilliam What in over 100 episodes has ever given you the idea we might have a story involving POISONING?". Twitter. Retrieved on 2016 September 8.