Beginning this list is the scarecrow-looking, cactus-like Pokémon, Cacturne. A Grass/Dark type that is only active at night.

Pokémon Sapphire: “If a traveler is going through a desert in the thick of night, Cacturne will follow in a ragtag group. The Pokémon are biding their time, waiting for the traveler to tire and become incapable of moving.”

Just from reading this entry, you may think that Cacturne is just some creepy stalker that just likes to follow people, but what happens after waiting for the traveller to eventually tire? Perhaps it gives them a backrub to ease their pain? Well, let’s have a look at another Pokédex entry in a different game, Pokémon Fire Red and Leaf Green:

“It lives in deserts. It becomes active at night when it hunts for prey exhausted from the desert's heat.”

Now do you understand? So it turns out Cacturne devours its target after waiting for it to become unable to move, when it can easily have its way with it. So now the question is, who are the ‘travellers’? Pokémon perhaps? Or is it maybe even humans? We don’t know for sure, but it’s quite disturbing to know that there are Pokémon that eat other Pokémon or humans for their survival. After all this time, we thought Pokémon only ate berries and Pokémon food, right?

Next up is a Pokémon from the 1st generation, Kadabra, a Psychic type humanoid Pokémon.

Pokémon Fire Red: “It happened one morning - a boy with extrasensory powers awoke in bed transformed into Kadabra.”

That’s right, you read that correctly, a boy, who turned into a Pokémon. Does that mean all Kadabra’s are actually boys with extrasensory psychic abilities? In Pokémon Emerald, the Pokédex entry states that it was rumored to be a boy assisting in research into extrasensory powers, so like Mewtwo, was it a lab experiment gone wrong? It’s quite disturbing to know that a human boy is able to turn into a Pokémon as a result of some human testing, which probably wasn’t very legal in the first place. The fact that the boy lost his way of living and has to remain as a Pokémon slave to a human, forced to battle for the rest of his life is even more disturbing.

The 4th Generation, balloon-looking Ghost/Flying type Pokémon, Drifloon, is the next one on this list.

Pokémon Sun: “Stories go that it grabs the hands of small children and drags them away to the afterlife. It dislikes heavy children.”

What can be more frightening than a friendly looking Pokémon known for the cause of missing children? A kidnapping Pokémon who tricks little children into believing it’s a balloon and then pulls them to their deaths.

In Pokémon Black 2, the Pokédex entry states that Drifloon are called the ‘Signpost for Wandering Spirits’, meaning that its job is to guide spirits to the underworld; however, its inability to distinguish Pokémon souls and little children is what makes it so scary. Though, because of its rather lightweight, it doesn't pose a formidable threat, but children who are deceived by its friendliness easily become victims of this Pokémon. This is quite disturbing to know, as little children are always wondering around in the world of Pokémon, exploring on their own.

Froslass is an Ice/Ghost type humanoid Pokémon from the 4th generation, its body resembles a kimono. Froslass is said to be the soul of a woman who became lost and died on a snowy mountain, her soul became attached to an icicle and thus was born into a Pokémon.

Pokémon Sun: “When it finds humans or Pokémon it likes, it freezes them and takes them to its chilly den, where they become decorations.”

A wicked witch of the ice and snow, Froslass is actually a creepy collector who displays its prey for itself, to watch for an eternity. It is known to be able to blow -58° F breath that it uses to capture humans and Pokémon. The Pokédex entry from the counterpart game says that the food Froslass most relishes is the souls of men, which means that in addition to freezing her prey, if they are men, it will eat them by draining out their soul. This is rather disturbing, as again, we find out from this Pokédex entry that Pokémon eats humans, and what’s more, it’s weirdly obsessed with eating only male humans.

The next Pokémon on this list is Lampent, a lamp-like Ghost/Fire type Pokémon from the 5th generation.

Pokémon Black and White 2: “The spirits it absorbs fuel its baleful fire. It hangs around hospitals waiting for people to pass on.”

Another Pokémon that steals the souls of humans, Lampent is said to be able to sense when someone is about to pass on and goes to absorb their spirit for its own survival, as its fire is the Pokémon’s own life energy. It hangs around near hospital in cities, waiting for the moment to come. It apparently also works with Litwick to lead people into the spirit world, stealing their life energy as they head there.

This entry is quite disturbing because Pokémon are relatively known to be friendly little creatures that make life more enjoyable, randomly appearing for fun. However, to know that one is secretly waiting around the corner for you to die, and then steal your soul so it can eat it for its own survival brings a whole new meaning to the word ‘dark’ in the Pokémon world.

Half way up the list comes the snail-like Pokémon, Sliggoo. A Dragon type Pokémon form the 6th generation.

Pokémon Sun: “It has trouble drawing a line between friends and food. It will calmly try to melt and eat even those it gets along well with.”

This Pokémon is blind, so it can’t exactly figure out if someone is a friend or a prey. It senses its surroundings using its horns like a radar system, Sliggoo is able to hear and smell. It is known to spray mucous that is capable of dissolving anything, once melted, Sliggoo will eat the remains calmly. It is quite disturbing and terrifying to know that a Pokémon like this exists, where it can mistakenly kill its own trainer and eat them without even knowing. Being such a deadly Pokémon, you wonder who in their right mind would want to own one of these if the risks gained from owning a Sliggoo outweigh the benefits of its power.

Up next is one of the original 1st generation Pokémon, Gengar, the Ghost/Poison type malicious ghost.

Pokémon Moon: “It apparently wishes for a traveling companion. Since it was once human itself, it tries to create one by taking the lives of other humans.”

Who would’ve ever thought that a straight up murderous Pokémon could exist? A lonely ghost only wanting a companion, and instead of seeking other ghosts, it tries to make one by itself. The other Pokédex entries can shed more light into this devious Pokémon; it apparently attacks by absorbing the heat from your body and laying a curse on you, making you feel a chill. It hides in dark corners and sometimes its prey’s shadow, waiting for the moment to attack and steal their life force. The Pokémon Moon entry also contains a part that says: “There is no escaping it. Give up.” It’s truly disturbing to know that there are killer ghosts in the form of Pokémon out there, wanting to kill little children for a companion.

Nearing the top of the list comes another 1st generation Pokémon, actually the devolution of the previous entry, Haunter.

Pokémon Silver: “Its tongue is made of gas. If licked, its victim starts shaking constantly until death eventually comes.”

Another Pokémon that cannot be escaped from, once it marks you with its tongue, or apparently even its gaseous hand, nothing can relieve the shaking until you die. On top of that, with every passing day, the victim will grow weaker and weaker. Haunter hides in the shadows, waiting for the next living thing to wander by it, where it silently stalks the victim and steals their life force. What’s even worse is that it is able to pass through any obstacle, as long as there is darkness. It is quite concerning to think that there is a curse easily able to be inflicted on anyone, with no apparent way to remove it.

At the 2nd place on this list is, Gourgeist, the pumpkin-like Ghost/Grass type Pokémon from the 6th Generation.

Pokémon Y: “It enwraps its prey in its hair-like arms. It sings joyfully as it observes the suffering of its prey.”

Now, if this isn’t truly disturbing, then we don’t know what is, a creepy eerie Pokémon that takes joy in the suffering of its prey. Gourgeist is some kind of psycho maniac that takes pleasure in seeing the pain of its victims, like a sadistic serial killer. What’s more is that on moonless nights, Gourgeist can be found wandering through town streets singing a song that curses anyone who is listening. It makes you wonder what could’ve caused a Pokémon to end up like this? Whatever the reason may be, with these kinds of Pokémon able to easily wander through towns makes you think, why aren’t Pokémon towns more secure with, perhaps, a huge wall to stop them from coming in?

Finally at the top of this list is, Yamask, a Ghost type Pokémon from the 5th Generation.

Pokémon Black: “Each of them carries a mask that used to be its face when it was human. Sometimes they look at it and cry.”

This is very disturbing for many reasons. First, it used to be a human? So humans are able to commonly turn into Pokémon now? What’s more, it has a mask of its own face from when it was a human? That’s on a whole different level; it makes Cubone wearing its mother’s skull look like child’s play. Why would it carry the thing around? Also the fact that it still has the memories of when it used to be a human and spends time crying over its own death and transformation is what makes this the most disturbing thing ever. It’s sad to know that the Pokémon is living to mourn over its previous human life, thinking how it was much happier when it used to be human than it is as a Pokémon.