Nightmare Fuel / Pokédex

The Pokédex acts like a real world wiki: as such, there are some pretty scary things in there. It is worth noting that many of the entries are based on In-Universe rumours and stories, and thus should be taken with a grain of Shoal Salt.

General

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    First Generation Pokémon (#1-#151) 
  • Beedrill are said to attack in big swarms, are as aggressive as hornets, have stingers for hands, and are 3-foot tall.
  • Ekans and Arbok which are pretty much giant, poisonous snakes.
  • Nidorino's horn is "strong enough to pierce diamonds", and he's a Poison-type.
  • Golbat. From the Pokédex, we learn that Golbat "feasts upon the blood of both people and Pokémon and does not stop until it is full", and Golbat is 1.6m tall and weighs 55 kilograms (5 feet, 3 inches, and 121 pounds). In caves and at night, they can be found everywhere.
  • Despite its cute appearance, Vileplume is carnivorous. It uses toxic and hyper-allergenic pollen to paralyze its victims, then eats them.
  • Parasect, once a cute little Paras that becomes consumed and controlled by a fungus. The Pokédex entry says that in Parasect, the mushroom has grown so large that it literally sucks the nutrients from Paras' body to the point that it's stunted Paras' growth permanently. In other words, Paras is a larval stage insect, and Parasect is one as well. Only the mushroom has grown, making the timid Paras into a very aggressive, dead-eyed Parasect.
    • The Pokédex entry from Crystal is particularly creepy.
    Pokédex: When nothing's left to extract from the bug, the mushrooms on its back leave spores on the bug's egg.
    • You wanna know the worst part? This type of thing happens to real insects. Case in point...
      • In fact, several of Paras' entries identify the fungus as the tochukaso, which is a subspecies of the cordyceps fungus. Be our guest and look it up, but depending on how you feel about Body Horror, you may want to keep a vomit bag handy.
    • You know what? The cordyceps' real-life victims have it easy - if nothing else, the fungus will eventually kill them off. And then there's Parasect who for all we know could still be alive and possibly even aware of what's happening to it.
    • Can we just take a moment to appreciate the fact that this is Parasect we're talking about here? You know, that innocuous little thing that you always just glanced over as a kid because Scyther and Pinsir looked cooler? The one you had no idea was basically possessed? That Parasect? Well, good luck ever looking at it the same way again.
  • Primeape is a prime offender. Pretty much every Pokédex entry mentions its Joe Pesci-like tendencies. As in, it can be pissed off by pretty much anything.
    • Sun and Moon adds an even darker layer to this. Apparently, Primeape is mad its entire life, and at times it can get so mad it dies. And its death is the only way it will ever be freed from its anger.
  • Poliwag's cute spiral is, in fact, its internal organs, which can be seen though its skin (much like actual tadpoles). However, when evolving, the swirl changes direction.
  • Kadabra and Alakazam are said to have incredible intelligence and psychic abilities (more so with Alakazam) like telekinesis: nothing could stop them from doing whatever they want.
    "It happened one morning - a boy with extrasensory powers awoke in bed transformed into Kadabra."
    • According to the old Red/Blue Pokédex entries, Alakazam's IQ is said to be 5,000 (compared to Stephen Hawking's 200-ish), and in Yellow, it states that Alakazam can memorize anything.
    • Alakazam is the embodiment of squishy wizard. It can't even move, having to telekinetically control his body parts. It could die just by having its muscles waste away.
  • Machoke's arms. "The skin has stretched apart because it can barely contain its huge muscles". Whether those lines are exposed muscles, veins, or stretch marks is never explained, and yet, Machoke somehow manages to smile about it. Manliness alone fails to justify it.
  • Bellsprout's Generation I sprite looks like a skull on a plant.
    • According to Weepinbell's Pokédex entries, it: a) is full of acid, b) catches prey by dousing it with a poisonous powder, then acid, c) has razor sharp leaves, which it uses to slice up prey, and d) apprently leaves nothing remaining. Oh, and it's a metre tall.
    • Victreebel is implied to be a man-eating plant: one of the Pokédexes mentions that "any and all explorers who have found Victreebel's secret society in the jungle never come back". Suddenly, James's Running Gag of being eaten by his Victreebel in the anime doesn't sound that funny, isn't it?
      • Also, its hunting method is... disturbing. Taken from its Soul Silver entry: "This horrifying plant Pokémon attracts prey with aromatic honey, then melts them in its mouth." Not to mention it's based off of a real plant that hunts with this exact same method.
  • Tentacool and Tentacruel are based on jellyfish. Jellyfish have tentacles lined with millions of tiny stinging structures designed to inject venom that, depending on the species, can cause incredible pain or death in humans (also mentioned in its Pokédex description). What makes this worse is Tentacool's status as Goddamned Bats in the water areas seen in the games.
  • Magneton: the Pokédex says that 3 Magnemite join together to form one of these. However, Gameplay and Story Segregation makes it worse, as even with three Magnemites in the party, when one evolves, the others are still there, leaving the player wondering where did the others come from.
  • Doduo and Dodrio seem okay at first glance—Doduo is a cute little ostrich-like bird with two heads, and Dodrio, its evolved form, as a more angry looking bird with three heads. But how does it get the third head? According to the Pokedex, one of its two heads splits in two!
  • Grimer and Muk leak "horribly germ-infested fluid". A single drop of Muk's fluid can turn a pool stagnant and rancid. Touching causes a fever and its footsteps leave behind poison ground that nothing will grow on for three years. Grimer, while less powerful, is more dangerous indirectly as it leaks more fluid than Muk which may eventually become more grimers. Grimer's germ-infested fluid can kill off all flora (including weeds) and make the land unfit for future plant life, touching it can either cause a horrible flu or fatally poison the victim. Basically, the "facts" imply a rampaging Muk is the Poké-verse equivalent to Chernobyl.
  • Gastly. This adorably goofy-looking ghost head is cute, but also over four feet tall. And since it's made of gas, it can "sneak into any place it desires", according to several Pokédex entries, and can "envelop an opponent of any size and cause suffocation" as well.
    • Haunter, in the manga, had a tendency to use its Dream Eater attack to steal people's souls. Haunter's Pokedex entries in the games imply he's an Eldritch Abomination slowly killing whoever it wants to kill.
    • Gengar, who appears at every full moon and scares people by pretending to be their shadow.
  • Hypno, a Child's Dream-Eating Pokémon. It leads children away by hypnotizing them and they're never seen again. The child abduction/molestation undertones are rampant (even the anime did an episode about it. It was toned down, of course, but that doesn't make it any better). There is an official shirt that plays on this, featuring a photorealistic Hypno leading away silhouettes of actual children. And a song, courtesy of Creepypasta.
    • Just to make your day worse, have you ever heard of The Erl-Kingnote ? It's a poem by Goethe that depicts a father racing through the forest to get his sick child home; as they ride, the child relates how he's being tormented by the elf-king, which only he can see, and his father attempts to convince him he's only imagining things. When he gets home, however, the child dies nonetheless. To supplement this: the one time you ever fight a Hypno in the wild by way of story-event? It's the one preying on Lostelle in the Berry Forest.
  • Voltorb and Electrode disguised as item balls in the first-gen games. It should be noted that Voltorb and Electrode were only discovered after the creation of Poké Balls: their Pokédex entry for Ruby and Sapphire outright says they're Poké Balls that came to life.
  • Learning that Cubone's headgear is the skull of its dead mother is illogical (and proven false by in-game Cubone breeding), but nevertheless a very disturbing implication.
  • Hitmonlee: Karate King of the Uncanny Valley, with mutated, short arms, no mouth or nose, just eyes that stare, and wicked toes that can rip flesh to shreds.
  • Starmie's Pokedex entries suggest that it might be an alien species and that its core sends radio signals into space. Then there's the fact that Staryu and Starmie are among the very, very rare Pokémon with virtually nothing in their appearance to mark them as living creatures: no eyes, no mouths, for all intents and purposes they look like inanimate objects with a jewel for a core. Starfish Aliens taken to a literal and rather unsettling extent.
  • Mr. Mime's laugh in Pokémon Stadium.
  • Scyther is a bug the size of a person which is apparently permanently pissed off. It also has scythes instead of hands. Which, according to one of its Pokédex entries, get sharper as it cuts things, meaning it gets deadlier the more it kills.
  • Pinsir apparently likes to grip its prey in his enormous pincers until it is torn in half. Said pincers are strong enough to shatter thick logs.
  • Gyarados is infamous in-game for knocking down cities when berserk - that is, always. It also has the Intimidate ability, that has the in-game effect of scaring other Pokémon as well. It can be found in tons of bodies of water.
  • Ditto. Found where Mew was cloned, with its same colors (both are pink normally, and blue when shiny), and the same weight. Adding the fact that both are the only Pokémon that can learn transform, Ditto might well be a failed clone of Mew (which explains why it's a melted blob).
  • Kabutops' Soul Silver's Pokédex entry managed to make it outright horrifying. To clarify, Kabutops is a vampiric 4-foot tall bipedal horseshoe crab with scythes for arms.
    Pokédex: "With sharp claws, this ferocious, ancient Pokémon rips apart prey and sucks their body fluids."
  • Mewtwo. He's essentially a genetically mutated feline created for the sole purpose of being the strongest Pokémon to ever exist, and given the state of his old home, he lived up to that purpose. While all Mewtwo wants is to be left alone in peace, making him angry is still never a good idea.
    • The games still have the implications, even if they don't outright say it like the movies do. Seeing the burnt out Pokémon Mansion and reading the journals of Mewtwo's birth (in which the scientist says they couldn't curb its viciousness) is enough to be creepy. Even worse - said scientist is implied to be Dr. Fuji, as seen in pictures in the Pokémon Lab and Blaine's Gym. Dr. Fuji, meanwhile, is implied to be Mr. Fuji. Yes, that sweet old man in Lavender Town who cares for orphaned Pokémon? It's very possible that once upon a time, he performed horrible DNA experiments to create Mewtwo. and the Truer to the Text Pokémon Origins confirms all that. This is perhaps even worse for him than in the regular animé, since unlike there, he lives with the knowledge of what he's created.
    • The Pokédex entries are none too reassuring. Putting them all together yields the picture that Mewtwo has been subjected to horrors and became violent as a result:
    Red, Blue, Leaf Green and X: It was created by a scientist after years of horrific gene splicing and DNA engineering experiments.
    Emerald: A Pokémon that was created by genetic manipulation. However, even though the scientific power of humans made its body, they failed to give it a warm heart.
    Gold and its remake: Because its battle abilities were raised to the ultimate level, it thinks only of defeating its foes.

    Second Generation Pokémon (#152-#251) 
  • Crobat, Golbat's evolved form, is rather creepy itself, being a 5 feet, 11 inches tall, 165-pound blood-sucking bat. Thank Arceus they can't be found in the wild... until Generation V...
  • Igglybuff's unsettling, enormous red eyes add an unnerving edge to an otherwise adorable Pokémon.
  • Xatu is a clairvoyant Psychic/Flying Pokémon that the R/S Pokédex describes as silent and unmoving because "shocked by the terrible things it sees in the future". In other words, Xatu is a Pokémon that spends most of its life paralyzed in fear from having visions of a bad future.
  • Unown are a Hive Mind of Eldritch Abomination Reality Warpers shaped like Alphabet characters (plus Question and Exclamation marks).
  • Wobbuffet (plus its Gen III pre-evolution Wynaut) is cute, funny, and, starting from Gen III, surprisingly awesome. But the first is that they're usually banned in tournaments, due to their ability, Shadow Tag, which prevents the opposing Pokémon from switching out. Also, its tail: it's mentioned in the Pokédex that there's a secret about them, and that Wobuffet are oddly protective of their tails. Someone figured this out when looking at how Wobuffet looks and acts like an inflatable punching bag, because it actually is (and, in the Super Smash Bros. games, it acts exactly as such). The 'eye spots' on Wobuffet's tails may well be its real eyes, and the tail might well, in fact, be the actual Pokémon: the entire body is merely a protective decoy.
  • Gligar looks like an Ugly Cute cross between a scorpion and a bat, but the Pokedex states it "swoops in silently, latches onto your face, and injects you full of poison". Basically, it's a flying facehugger Pokémon.
  • Scyther's evolution, Scizor, is pretty much the same, but is coated in metal armor and has metal pincers for hands. Ouch.
  • Houndoom is basically a Hellhound, with a little skull pendant and a call that the ancients once imagined to be the call of Death itself. And to make matters worse, if left untreated, their fire attacks will never stop hurting if they hit you. And yet they're still capable of becoming the player character's loyal and trusted friend. They probably have the same problems as Rottweilers do in Real Life.
    • Downplayed by one particular episode where a Houndoom went out of its way to help Misty's Togepi find its way back to Ash and company, protecting it and developing a bond with it on the way.
  • Larvitar's Pokedex entry:
    "A Pokémon that eats soil. Once it has eaten a large mountain, it goes to sleep so it can grow."
    • Larvitar and its evolution Pupitar are found in the wild in Mt. Silver, near the Victory Road. A zone whose geography has severely changed from Gen I to Gen II, disappearing a whole route. A very transitated route, leading to the Pokémon League.
    • The final evolution, Tyranitar, is strong enough to make entire mountains crumble: after one goes on a rampage, "maps have to be redrawn to account for the damage".
  • Imagine this, a bird. Not that scary, right? Ok, now picture a bird that stands at 17 feet tall. Unnerving, but not that scary. Now, imagine this bird looks like some sort of draconian beast. Not only that, but said bird was once worshipped as a god and (accidentally) caused a terrible storm that burned down the tower it perched on killing three Pokemon inside due to it losing control of its immense power. Also, imagine that a single flap of its wings is enough to cause devastating hurricanes. Folks, say "hello" to Lugia.
    • And, to make Lugia even scarier? Meet Shadow Lugia. It's basically a Lugia forcibly turned "evil" by turning into a fighting machine. Did we mention that it's established that "Shadow Pokémon" in general are known to attack humans? Yeah, let that sink in.
    • On the bright side, Lugia isn't always Nightmare Fuel, as shown by a three episode story involving a baby Lugia and its parent and the second movie, when another one serves as a guardian to Shamouti island.

    Third Generation Pokémon (#252-#386) 
  • Regarding both of Wurmple's families:
    • Beautifly is a three feet tall swallowtail butterfly whose multiple Pokédex entries say to be savage, and has few qualms about stabbing things with its proboscis and - like Gorebyss from further up - draining all their fluids.
    • Cascoon's Pokédex entries state: "Encased within its tough cocoon, it endures attacks. It never forgets the appearance of its foes.", and in Platinum, "It never forgets any attack it endured while in the cocoon. After evolution, it seeks payback".
    • Dustox, Cascoon's three-foot-eleven and Psybeam-firing evolved form, is a moth, and as such, it's only active at night, hunting people down while they sleep.
  • Kirlia and Gardevoir: apparently Kirlia can distort reality and create a rip in dimensions whenever they use their psychic powers. Gardevoir can do that, but are stronger to the point they can create black holes to protect their trainer. They also have more biologically in common with ghosts, walking sludge, and a floating electric viper-lamprey than other humanoid Pokémon.
  • Shedinja looks like a cicada skin, but, according to legend, will steal the souls of those looking in its back. Too bad it's seen from the back when it's one belonging to the player.
  • Sableye. According to the Ruby Pokédex, they're thought to steal the spirits of people when their eyes glow in the dark. Their eyes are made of crystals. However, Sableye's eyes turned into gemstones because they EAT gemstones. Sadly, doing the math is not for the best here.
  • Aggron (a fellow beastly-looking Pokémon who's a bipedal metal Triceratops) lives around mountains and will savagely protect its territory from all comers, and repairs any damage to its home.
  • Gulpin and Swalot play on the Primal Fear of getting eaten. Swalot can swallow just about anything (the Pokédex says a car tire is the largest thing it can eat), except its own stomach. And a Swalot has no teeth, so whatever (or, Arceus forbid, whoever) it swallows goes down whole and gets broken down by its stomach acid, said to be powerful enough to melt iron.
  • Carvanha and Sharpedo, the former can tear through boat hulls and attack in swarms while the latter can destroy a supertanker with its sharp teeths, now imagine coming face to face with them.
  • Spoink's Pokédex entries state that if it stops bouncing, its heart will stop and it will die. Its fainting animation in Colosseum and XD: Gale of Darkness have it falling onto the ground.
  • Cacturne. It's a four-foot-tall-desert-crawling-cactus-turned-scarecrow that apparently stalks travellers (not Pokémon, not people, just "travellers") until they can no longer move, then it drains them dry. It's also subtly implied that this bit is preceded by a No-Holds-Barred Beatdown, so don't expect it to be quick or painless.
  • Zangoose, while badass, can be scary considering a closer look at its fur suggests the red markings are blood and scars. His paws appear to be blood soaked, too. And it's pissed off all the time.
  • Seviper: same deal as with Ekans and Arbok, a giant, poisonous snake.
  • Whiscash looks goofy, but it's an extremely territorial Pokémon that will generate a three-mile-radius earthquake when in danger. It will also eat anything that's alive.
  • Banette, while creepy enough in appearance (a maliciously grinning, red-eyed, ghost-creature with a zipper for a mouth), are explained in the in-game Pokédex as being possessed dolls seeking revenge on the children that threw them away.
  • Dusclops is a cyclops shell with a giant glowing red eye; a shell as in, "it is a black hole on the inside", that can brainwash people just by waving its hands around. Duskull have always been creepy to some, despite the "But it's so cute!" found in much of the fandom; nevermind the Pokémon's very Grim Reaper-esque features.
  • Glalie freezes its victim, not unlike Froslass, but instead of being displayed like a trophy of some sort, the poor creature is eaten. And to top it off, some of Glalie's entries state that it does such in "a leisurely fashion", possibly implying that either Glalie does this even when it isn't feeling particularly peckish or doesn't experience hunger at all and just does this for kicks and giggles.
  • The Regi Pokémon: Regirock, Registeel, or Regice. They're giant, faceless stone golems that have been around for apparently an extremely long time, as indicated by Regice's pokedex entry of it being formed during the Ice Age.
  • Gorebyss: despite its beautiful looks, "it consumes its prey by sucking out the victim's body fluids". Or to quote Gorebyss's Pokédex entry from Emerald, "Its light pink body color turns vivid when it finishes feeding." Its name is a portmanteau of the words "gore" and "abyss".
  • Latios and Latias are found in the game carrying the item Soul Dew, which increases their stats. In the movie Pokémon Heroes, it's discovered that the Soul Dew is actually made from the soul of a dead Lati. So the Lati seen in the games is carrying around a trapped soul to make it stronger.

    Fourth Generation Pokémon (#387-#493) 
  • Combee are really cute, but being swarmed by a bunch of them would be frightening, which is what Vespiquen forces them to do. The Combee fly out of the honeycomb at the bottom of Vespiquen's skirt-like abdomen, which is exactly why it's shown lifting up its abdomen in its official artwork.
  • Cherubi is a sentient cherry with eyes and a mouth. The fact that it has a second, smaller head it can eat for nourishment is even creepier.
  • Drifloon, a cutesy balloon Pokémon, apparently tries to drag people to the underworld (but is so weak that it gets dragged along like a common balloon you see at birthday parties).
    • For Drifloon, it was made so much better in Sun and Moon's pokedex entry:
    Sun Pokedex: Stories go that it grabs the hands of small children and drags them away to the afterlife. It dislikes heavy children.
    Moon Pokedex: If for some reason its body bursts, its soul spills out with a screaming sound.
    • Drifblim, its evolution, is more successful at carrying kids off into the land of the dead.
  • Spiritomb. It's a Ghost/Dark-type that was sealed away for 500 years as punishment for misdeeds, made from 108 souls. Additionally, Ghost/Dark types were the only combination that's not weak to any attack until Fairy-type was introduced.
  • What happens to two of the three "members" of Magneton when they evolve into Magnezone? They appear to be partially absorbed by the middle one.
  • Yanmega, Yanma's Gen. IV evolution, is one of the largest Bug-types, and is based on an actual prehistoric giant dragonfly, it is over six feet long, can dislodge trees when taking off, is capable of lifting a grown human off the ground, can shred its enemies' internal organs from the shockwaves created by its wings, and is known for "biting apart foes midflight". Its appearance is scary by itself as well.
  • Porygon-Z. It's a glitched version of Porygon2 evolved using a mysterious disc that was not approved by Silph Co., as a jarring metaphor for software piracy: "Porygon-Z can sometimes be seen shaking rapidly for a short time. Whether this is intentional or a glitch is unknown.".
  • Dusknoir, Dusclops's Gen IV evolution, is a huge cycloptic ghost with no legs, weird markings, and a rather haunting body, with a reputation of dragging people to the spirit world. The markings on its chest are actually a second mouth.
    • It's a rather minor thing, but when you look at its X/Y sprite, its one eye is positioned in such a way that whatever direction you're looking at it from, it will always look like it's staring directly at you.
    • On the plus side, it is also said to guide lost spirits home. Furthermore, in its first anime appearance, it actually protected Ash and co. from being dragged into the ghost world.
  • Froslass, Glalie's evolution counterpart, is based on the yuki-onna, a type of ghost in Japanese folklore that appears during snowstorms and takes the form of a beautiful young woman without feet coming into being when a regular, foot-having young woman freezes to death in the mountains during frigid weather. Depending on the disposition of the ghost, which varies from story to story, it will either guide you to safety or get you hopelessly lost so that you suffer the same fate as she did. Because of this, there's the implication that Froslass is not above having sex with her victims before said actions (or it would, if this wasn't a children's video game).
    • There's also the fact that, in order to get a Froslass, you need to evolve a female Snorunt (an Ice type) by exposing it to a Dawn Stone. Froslass is an Ice/Ghost type, so this means that she melted.
    • And then there's her Pokedex entry...
    "It freezes prey by blowing its -58 degree F breath. It is said to then secretly display its prey."
  • Regigigas, the Regi "boss", has been rumored to move entire continents.
  • Giratina was banished to another dimension for its extremely violent nature by Arceus. During its time in that dimension, its presence reformed the dimension into the Distortion/Reverse World. In its home world, Giratina "silently gazed upon the old world" through reflective objects, such as mirrors and still pools of water. Until recently, it can be seen appearing in an ancient cemetery, said cemetery being the entrance to his home dimension. So there you have it, a violent, 22'08" tall Satanic Archetype can appear anytime into the real world when it's not grudgingly watching you from its home dimension. There's no way of killing it since it's already dead (Ghost-Type).
    • There's also its overworld sprite in Lost Cave, moreso than in Distortion World, because it's there and you can be walked around. If it equated to actual size, and considering proportions to the player, Giratina is about six times taller than the player and just looks like some sort of Eldritch Abomination centipede/dragon/ghost... thing. It doesn't help how purely roar-like its ID cry is.
  • Darkrai. The Pokémon that locks a small child in a perpetual nightmare until players find a MacGuffin. Its in-game ability is acting as literal Nightmare Fuel. However, Darkrai doesn't do it on purpose or out of malice; it's a defense mechanism that it can't control.
    • To capture Darkrai, players must go into the previously locked Harbor Inn, where a 'hotel manager' says that he has been waiting for them, only to force them into a bed afterwards; the player character falls asleep, where he's transported to Newmoon Island. He or she will have to defeat or capture Darkrai to escape. When waking up, the man is nowhere to be seen, and out of the inn, a sailor will say to you that "you were asleep for a long time", and mention that no one's lived in that inn for 50 years.
  • Behold Arceus. Doesn't look too scary, right? Just a weird-looking Kirin horse-thingy Pokemon, right? Nope. For one thing, its signature move "Judgement" is capable of destroying entire cities and taking out weaker Pokemon with ease. Not only that, but its "Multitype" ability allows it to become any of the 17 elemental types of Pokemon available (meaning it can also learn a wide variety of moves). Oh, but it gets better. You see, Arceus isn't just any run of the mill Legendary. It just happens to be the Pokeverse's version of God. Luckily for us, "God Pony" prefers to nap and not interfere with the Pokeverse directly. That is, unless you piss it off, then it will go so far as to destroy the entire world in its rage.
    • Taking an Arceus to the Ruins of Alph in HeartGold/SoulSilver results in the most out-of-place, trippy cutscene ever; afterwards, Cynthia points out that "this is what happens every time an egg is created". As in, what always happens at the Day Care. According to Word of God, the images you see are actually Arceus recreating the universe from scratch just to give that egg.

    Fifth Generation Pokémon (#494-#649) 
  • Musharna, with pink smoke protruding from its head, who seems to be perpetually sleeping: this has the unfortunate effect of making it look as though it's suffered a grievous head injury.
  • The Timburr line is pretty much 60% veins. Its muscular veins extend across it, which is pretty disturbing when you take a good look at it.
  • Seismitoad essentially looks like a Politoed, only blue and with a bunch of orbs around its skin: one of its available abilities, Poison touch, causes anything it touches to be poisoned. Oh, and it's said to spray acid from the orbs on its head. And Ghetsis has one.
  • Scolipede is an eight-foot-tall (not long, tall) centipede (beating out Yanmega's 6 feet) that "clasps its prey with the claws on its neck until it stops moving." Then, as if that wasn't enough, poisons them. And in case that didn't do the trick, it learns Steamroller, which essentially flattens the opponent just like the construction machine of the same name.
  • Krookodile's entries describe it as being able to "...expand the focus of its eyes, enabling it to see objects in the far distance..." Plus, "They never allow prey to escape".
  • Yamask's Black Pokédex entry says that the mask on its sprite is actually its former human face, and the Pokémon weeps over memories of being alive. It was apparently born from the spirit of someone buried in an ancient grave.
  • Archeops may be endearingly pitiful, but its Black Pokedex entry shows that it's a clear case of Not So Harmless: "They are intelligent and will cooperate to catch prey. From the ground, they use a running start to take flight." And according to other Pokedex entries, it can run 25 miles per hour. Oh, and the Moon Pokedex entry for it states that "when one Archeops had the prey cornered, another would swoop on it". That's right: Archeops are basically the Pokemon equivalent to the Velociraptors from Jurassic Park...but unlike those raptors, Archeops can fly...
  • Gothorita, the Pokémon that is known far and wide in Unova for hypnotizing people. Sometimes those people are never seen again. Its Dream World Ability is Shadow Tag and its pre-evolved form is known for obsessively staring at people.
  • Amoonguss uses its Poké Ball mimicry to lure prey, but Pokémon aren't usually fooled by it. Humans, on the other hand, might not know better...
  • Frillish paralyze prey with poison, then drag them down to their lairs, five miles below the surface.
    • Jellicent's (Frillish's evolved form) line from its Black Pokédex is disturbing: "The fate of the ships and crew that wander into Jellicent's habitat: all sunken, all lost, all vanished." The white Pokédex mentions that "life energy" is its favorite food. In Black 2 and White 2, the Pokedex states that it has an undersea castle made from the remnants of the ships that it attacked. This might be a bit problematic for the Unova region, given that Jellicent can be found readily in most bodies of seawater. No wonder they're so big on trains.
  • Eelektross is an enormous lamprey that is also a living dynamo. It hunts by slipping out of the ocean, grabbing its prey, shocking them, and chowing down. And Ghetsis also has one. It also has no weaknesses in the games. Its type's only weakness, Ground, is canceled out by its ability, Levitate.
  • Elgyem, the alien Pokémon. It and its evolved form, Beheeyem, can completely rewrite a person's memories, and the fact that they're aliens and have seemingly attracted little attention from the scientific community means that they probably do this whenever someone sees them.
  • The Litwick family line is infamous for not only stealing, but burning any souls it catches:
    • Litwick is a cute little Fire/Ghost candle, but the Pokedex says "It burns brighter when it absorbs a human soul", and that "It tricks people into thinking it's a helpful guiding light before doing so". It's made even creepier in Black 2/White 2, where a young girl challenges you in the Celestial Tower with one. After losing, she says that losing battles makes her tired. In other words, it's leeching off her life force, and she has no idea what's going on. That's right, kids - even your own Litwick will leech off your soul, so being its owner doesn't even make you safe! Made better by the fact that she goes to the Pokémon Center afterwards to rest, but it's still creepy.
      • The White 2 entry outright states that, "Its flame is usually out, but it starts shining when it absorbs life force from people or Pokemon". Its sprite always has the flame lit. So either it's feeding on the Pokemon it faces, or Nate/Rosa are going to end up lethargic...
      • Which kinda makes it all sad, too, because it's possible it can't help but suck out souls with so many living creatures (much like how Pichu can't help but shock itself when it uses its abilities), so the little Hinkypunk-based buddy might be unintentionally Dementoring its beloved trainer. After all, you can max out your friendship with one just by levelling it up from a Litwick to getting its immediate evolved form Lampent to learn its last attack at level 69. Litwick are found in places where there aren't usually a lot of other living creatures apart from other Litwick, and Litwick is always the most common Pokemon in the area if it's not exactly equal to the rest. It's a toss-up to see if this is because Litwick have killed everything else (which begs the question of how three different Psychic Pokemn can live beside them despite being very weak to them and why they haven't evolved into Lampent or Chandelure), or because they've purposely put themselves away from others so all they have are the souls of the already-deceased to eat (which makes sense as the places they go are haunted) and others joined them because of one thing in another.
    • Lampent, Litwick's evolved form, "wanders the streets actively looking for the souls of the dead", as well as "appearing when you're on your deathbed and severing your immortal soul from your body". It hangs around hospitals waiting for people to pass on.
  • Pawniard and Bisharp. Carnivorous Pokémon that'll hunt their prey down, at which point the Pawniards will imobilize it by clinging to it sinking the blades their bodies are made of into the prey's body, followed by Bisharp making the final blow. And guess what? Ghetsis has one!
  • Heatmor's dex entry. It grabs a Durant, blows fire on it until the heat melts its exoskeleton into metallic goo, then delightfully cooks its internal organs and devours them one by one. Of course, given Durant is a bug- and steel-type, it's only logical that his Arch-Enemy is a fire-type anteater, akin to the Zangoose/Seviper rivalry and Zangoose's Immunity.
  • Durant: Ants that are thirty centimetres tall (roughly 11 inches), with steel covered skin that would make it nigh impossible to stomp on them.
  • The Dark/Dragon line of Deino-Zweilous-Hydreigon starts with one head, grows a second one as Zweilous, and gains a third one as Hydreigon; while two of them become hands. The creepiness comes from the dex entries: it says that Zweilous's heads fight over food, which means that both of them are intelligent.
    • Hydreigon is also one of the few Pokémon who appears to be explicitly malevolent and destructive in nature. It's even called the Brutal Pokémon. According to its dex entry, "The heads on its arms lack brains." One of the heads loses its ''brain.'' Alternatively, its brains merge and it's driven insane, accounting for its "brutal" nature. Even better (or worse), wild ones will SWOOP AT YOU FROM OUT OF NOWHERE on the Kalos Victory Road. And to make things even more worse, it's another creepy Pokémon that Ghetsis has in his possession. It's the cornerstone of his team.
  • While Volcarona is mentioned as having been deified as a bringer of light, it still is an enormous (as in, 5 feet tall and weighing a hundred pounds) moth that spreads embers wherever it goes; one flap of its wings is enough to set vast swaths of land ablaze. And it's just one of many. One has to wonder what would happen if Volcarona encountered anything Weakened by the Light...
  • As far as openly malevolent Pokémon go, there are Tornadus and Thundurus, the storm djinns. These are pogeys who, for no apparent reason whatsoever, flew around causing massive, land-devastating storms at random. Thankfully, they have a mediator in Landorus.
  • Kyurem. Apparently, it would actually hunt and consume humans and Pokémon alike. Worse still, it's a Legendary.
    • It gets worse in Pokémon Black 2 and White 2. You know its badass new formes of Black/White Kyurem? They're caused by Kyurem turning Reshiram/Zekrom back into the Light/Dark Stone and using them as mere powerups for itself. And if that isn't enough, it turns out that the fusion isn't even a complete one, since N outright says he can hear his dragon trying to speak to him. Plus, this makes one wonder if absorbing both Zekrom and Reshiram would actually allow it to be complete again (thankfully we never find this out). This is particularly scary if you watch the fusion cutscene, and makes you shed a tear or two for N's poor dragon. AND it makes you feel guilty afterwards if you capture N's dragon and Kyurem and want to recreate Kyurem's new forme. Slightly subverted in that Kyurem and the other two dragons were once one being, and Kyurem is just trying to become whole again.
  • Genesect was feared as the ultimate hunter 300 million years ago, long before humans, when there were mostly small lizards, amphibians, and bugs. A four-foot tall bipedal insect would be an overpowered monstrosity by comparison, and it could have easily wiped out all life on the planet. And there wasn't just one of them, it was an entire species. It's a good thing it went extinct... and then Team Plasma revived one, gave it cybernetic enhancements and put a giant cannon on it, making it even more powerful. Oh, and they did this to make the strongest Pokémon ever, because that guy's attempt over at Cinnabar went so well for him, didn't it?
    • It gets worse when you consider why it might have gone extinct in the first place. Species generally go extinct when the climate changes too much for them to adapt, their food source goes extinct, or something else outcompetes them. That provides two new horrors: either Genesect wiped out the local ecosystem, or something even worse took over.
    • Genesect, as a Mythical Pokémon, has no real residence like most Legendaries, so it's not unlikely that it roams the planet. If its instincts and nature haven't changed much post-upgrade, woe be to anyone living near wherever it may currently be...

    Sixth Generation Pokémon (#650-#721) 
  • Espurr's Thousand-Yard Stare is pretty creepy. Then you find out why it's staring like that - it can barely stop its psychic power from leaking out, and is concentrating with all its might to not unleash it accidentally. But it's just a basic-stage Pokemon, how bad can it be? The blast radius of an Espurr that loses control is three hundred feet of complete and total destruction. Oh, and if you've never played with your Espurr in Pokemon-Amie before, you can totally pet its ears - which are what's holding the psychic power back, so a newly-caught Espurr apparently doesn't mind accidentally killing you. Brrr.
  • Honedge, a possessed sword. Looks like an Equippable Ally, right? Wrong! In fact, it is an Artifact of Death that punishes those who try to invoke it and wield Honedge like a sword will find its tassel wrapped around them and sucking their life force dry. Now how would Kalos' residents know this fact? It's a good thing that Aegislash, its final evo, is more benevolent. Except not in X, in which it's a mind-control tool for ruthless leaders.
    • Many Pokemon have spots they don't like to be touched in Pokémon Amie. Honedge is fine with its hilt being rubbed, but if you touch its scarf-arm it either: bristles furiously and makes as if to unsheath itself if it loves you, or takes pleasure in sucking you dry if it's a stranger to you. Doublade is much more easygoing.
  • Inkay and Malamar in X and Y. To boot it off for a start, they are the first Pokemon to be typed Dark/Psychic. They are Cthulhumanoids who have the power to control others. And it's implied that people have tried to use them in the past for their own nefarious schemes. Try not to think about that too hard.
  • Dragalge. The Y and Alpha Sapphire entries state: "Tales are told of ships that wander into seas where Dragalge live, never to return," as if Dragalge territory is the Pokemon equivalent of the Bermuda Triangle.
  • Tyrunt and Tyrantrum are Pokemon based off of T-Rex. And they both have violent tempers. Tyrunt may be cute but it throws tantrums when it does not get its way. And Tyrantrum´s bite is so powerful that it lived as a king in its time because nobody could fight him!
    • Those well-versed in paleontology will know that that the strength of Tyrantrum's bite is accurate to the real world Tyrannosaurus rex, which holds the record for the strongest bite force of any known land animal.
  • Trevanant is based on a kodama, a type of spirit that inhibits trees. Not only does it have menacing looks, but it can trap people who harm the forest so that it can never leave.
    • In the anime, one traps and kidnaps Ash. While it was only trying to get Ash to rescue a Bonsly and Sudowoodo trapped in a cage by Team Rocket, just imagine what it would do to someone who damages the forest.
    • Its pre-evolution, Phantump, is scary for a completely different reason: the dex entry states that they are the ghosts of children who got lost in the forest.
      • The anime shows that Phantump have the ability to imitate the voices of children. Combined with the aforementioned entry, this has horrifying implications - children who hear a Phantump's voice might become curious and wander into the forest, more than likely get lost and die, and become Phantump themselves.
  • Gourgeist, the evolution of Pumpkaboo. Its Y dex entry states it sings joyfully while watching its prey suffer.
  • The version mascot of Pokémon Y, Yveltal. Dusknoir might be the Pokemon's world of the Grim Reaper, but this bird of prey is based around death itself. It's Red and Black and Evil All Over and is about twenty feet tall. And it's signature move is Oblivion Wingnote . It has plot relevance in Pokémon Y.
    • Its method of immortality. When it dies, it turns into a cocoon and kills everything in the area by absorbing its life force, like some kind of twisted caricature of a phoenix.
    • And the fact that the Pokédex knows that this will happen implies it has happened before. Anyone notice how empty the Kalos region is in terms of unique Pokémon? Or how a good chunk of the Pokémon are ghosts... it's happened before, killing everything in the region, removing the original species. All the Pokémon in the game are either new species, legendary, or imported from different regions.
    • The worst thing about this harbinger of destruction is that, counter-intuitively, its existence and life are necessary for life on Kalos to continue. It's like a Keter-class SCP that you have to preserve at all cost lest it causes even more casualties.
  • And rounding out the Kalos Legendary Trio is Zygarde, who is single-handedly the most bizarre and otherworldly Pokemon in existence. It is a Pokemon composed of numerous Cells and Cores that take on stronger and more disturbing forms the more cells it has. At 10% of its power, it resembles an alien doberman dog. In its default 50% form, it resembles a monstrous serpentine creature. And then there's its Complete Form, which is a Kaiju-sized Humanoid Abomination with a Belly Mouth, a tail, and four cape-like wings. However, according to the Pokedex, it's actually a Gentle Giant that is quite content to be left alone... until you mess with the environment. That's when things get really ugly.
  • Hoopa's a cute, mischievous little thief who's not scary at all. At least, that's Hoopa Confined - Hoopa Unbound is a barbaric-looking monster with multiple arms, tusks and an Evil Laugh. Oh, and it's as large as Gyarados is long. It's not implausible that before it became Confined, Hoopa didn't bother with being sneaky and just took whatever it wanted by force, with few things able to stop it. And because it's a Reality Warper, it could appear out of nowhere and disappear just as suddenly. It's a blessing that someone or something managed to seal away Hoopa's power.
  • A walking volcano is a terrifying thought, right? Well, meet Volcanion, a nigh-perpetually pissed off creature with enough power to blow up an entire mountain. And if its personality in its movie is reflective of its personality in the games, it doesn't like humans one bit. Thankfully, it keeps to itself within mountains away from mankind, but it's not hard to imagine what it'd do to a human settlement if it was pissed off with one.

    Seventh Generation Pokémon (#722-#802) 
  • Bewear may be cute at first sight, but it's The Dreaded due to its unfortunate combination of being a Cuddle Bug that Does Not Know His Own Strength. Trainers are specifically warned against raising one, as many a Trainer has been killed by Bewear giving them a hug and crushing their spine.
  • Sandygast and Palossand are a haunted sand pile and a haunted sand castle. Pretty goofy and silly, right? But these things are soul-drainers, and brainwash unsuspecting humans into adding more sand to them.
  • Komala is born asleep and dies asleep. It never wakes up, and only moves when its dreams make it toss and turn. Forget antimatter dragons and death gods, this little guy is the Pokémon incarnation of nihilism.
  • Mimikyu is a little Bedsheet Ghost dressed in a Pikachu costume because it wants to have friends. But what does it look like under the costume? We get one clue: a scholar who looked under it died of shock.(However, said scholar could have died of a heart attack because the thing was so freakin' cute beneath the sheet and people and/or Mimikyou as a species thought he died of shock, given it's a Ghost type and all...)
    • Two things can be deducted about Mimikyu based on attacks it can learn: Shadow Claw, Hone Claws, Slash, etc. indicate that it has claws. And it can also learn Leech Life, an attack where the pokemon bites the enemy to suck its blood. So it's safe to assume it has fangs...
  • Female Salandit can produced pheromones that can hypnotize humans and Pokémon alike. Then it becomes Salazzle, who travels everywhere with a "reverse harem" of hypnotized male Salandit. It's basically the Pokémon equivalent of a Succubus.
  • Wishiwashi. Tiny little fish that according to Pokedex entries, are cowards, weaklings and tasty. However, they have the Ability Schooling, which makes them gather in great numbers until they form a giantic, scary-looking fish with multiple Glowing Eyes of Doom. According to the pokedex entry, even Gyarados are scared of school form Wishiwashi.
  • Type: Null looks a tiny bit unsettling already thanks to its dark color palette, but it's also a synthetic Mix-and-Match Critter that's even more of a Frankenstein's monster of a Pokémon than Mewtwo ever was. That, combined with its name, makes it feel like it's just barely considered a Pokémon at all. It's also said to have been created to rival the power of Pokémon spoken of in myths to complete a "certain mission". Lord knows what that may be.
    • Oh, and the kicker? It's on Team Skull's side. They don't seem so goofy and harmless with a powerful synthetic hellhound with them, do they?
      • That's subverted when you find that Type: Null's owner, Gladion, is hardly considered a true member of Team Skull. However, when you go to the Aether Foundation to rescue Lillie, you can find out many things concerning Type: Null (then called Type: Full), including the fact that the artificial Pokémon went berserk when scientists of the Aether Foundation tried to force the RKS System into it, causing it to go berserk and the project to be deemed a failure. Since then, only three were made, with Gladion stealing one and running from the foundation's president and his mother, Lusamine, with the other two remaining in cryogenic sleep.
  • Cosmog might be an adorable little creature that also serves as a Token Good Teammate for its fellow Ultra Beasts, but when exposed to sufficient stress, it can inadvertently create wormholes to the UB dimension. Never mind the fact that Lusamine exploits this ability in the game itself, but also that at any time, a Cosmog from the UB dimension can randomly create a portal and unleash these horrors upon the world.
  • Tapu Lele. It's an adorable little pink, feminine, butterfly creature with a curious nature that stopped an entire war just by soothing the warriors with its rejuvenating scales. Not scary at all, right? Well, for starters, despite its appearance, the Pokédex states that it is "guilelessly cruel". Its scales, while very useful for healing, can be very dangerous if taken in large amounts, and it scatters them everywhere on a whim. And that part where it stopped a war by healing the warriors?? That's just one side of the story. This thing has destructive capabilities rivaling even Yveltal. While the English website for Sun and Moon simply states that it stopped the war by healing the soldiers, the Japanese website reveals a horrifying truth: contrary to popular belief, it actually ended the war by killing all the soldiers with its dangerous scales.
  • Ultra Beasts. There's something to be said about them when, in a world that considers living Poké Balls, super-enhanced clones, ancient robots and even the creator of the universe to be Pokémon species, these creatures are at first treated as something else entirely. They're also very powerful, a threat to humans and Pokémon, and at first referred to only by numbers.
    • The most horrifying thing about them isn't the fact that they're horrendously strong, but by how just existing they are a Walking Disaster Area. Even more so with Celesteela, which is basically a huge bamboo rocket mecha who causes firestorms just by moving normally due to the exhaust from it's rockets, and Guzzlord, who never stops eating and once ate an entire ocean (and is heavily implied to have eaten a woman who was originally part of Looker's beast-stopping team), and can convert anything it ate so perfectly, there is no waste. It's even more terrifying to think just what kind of places would require anything to evolve into things like these.
      • Nothing natural, that's for certain.. The horror of Guzzlord or more specifically, where they originate from, is expanded upon in Ultra Sun & Moon, when you visit their home dimension, the Ultra Ruin, which is itself implied to be an alternate universe Hau'oli City. From gathering information, it's heavily implied that a power plant suffered a disaster of apocalyptic proportions, destroying the world. Either Guzzlord arose from this disaster, was specifically created to deal with the fallout, or somehow already existed is unknown, but while the place was so mutilated the inhabitants seemingly had to be evacuated to other planets, the Ultra Beasts were left behind to devour the remains. Even worse for the planet, the same person notes the numbers of Guzzlord have been decreasing as of late. In other words, they've destroyed the world so thoroughly that there's nothing left for even them to eat, let alone for any hope for any other type of life.
  • And after the Ultra Beasts is Necrozma, an entirely pitch-black prism creature that's bizarre looking even next to the Ultra Beasts. Aside from having a name derived from nekro (Greek for "death"), the Pokédex lets us know that it's always shooting lasers... and has an extremely vicious disposition, much like Mewtwo and much unlike almost every other Pokémon. Necrozma doesn't seem so likely to be a nice Pokémon, does it?
    • Its Sun Dex entry tells how it came from another world in ancient times. Sounds just like Solgaleo and Lunala, doesn't it? Which raises the question; just when did it come, and what did it do when it arrived given the aforementioned vicious nature? Is it related to Cosmog?

http://tvtropes.org/pmwiki/pmwiki.php/NightmareFuel/Pokedex