welcome trainers and pokemon from all over the world

(fact 3)
After the Pokémon fights off the virus and becomes immune, it can’t spread the virus any more. It's extremely rare to find a Pokémon in the wild infected with Pokérus. In fact, some say that the chances are 1/3 of the changes of finding a shiny Pokémon. What's more, because there's no visual sign that a Pokémon is infected, chances are, the player probably defeats or runs away from infected Pokémon,

(fact 2)
What does it do? Pokérus is actually good for your Pokémon! When a Pokémon has caught the Pokérus, it will gain double the effort values for battling. Because of this, players have found ways to delay the amount of time that a Pokémon is infected.

(fact 1)
Pokerús is a microscopic life-form that can attach to the Pokémon. It first appeared in the Generation II games. The infected Pokémon can pass it on if it's being held next to another non-infected Pokémon in your party. It’s actually easiest to spread if the Pokémon is in the main party after a battle.

(fact)
The move “Splash” is a mistranslation of the Japanese word “hop,” which is why it’s a normal-type move and not a water-type.

(theories)
Taking on the appearance of an alluring lady--as envisioned by an alien entity with an obviously tenuous grasp of human attractiveness--Jynx has all the trappings of a seductress: its Pokedex entries describe it as "bouncingly alluring" (whatever that means) and note how it "seductively wiggles its hips as it walks," charming people into dancing with it. Many of its attacks are also enticing/romantic in nature, like Lovely Kiss, Captivate, Fake Tears and Heart Stamp--attacks that Jynx uses to lure its enemies into a false sense of bliss before brutalizing them, which seems to fit the bill for a succubus just right. Get thee back, demon!

(theory is not my)

(theories)
Jynx is a mythological succubus
Wikipedia defines a succubus as "a female demon or supernatural entity...who takes the form of a human woman in order to seduce men." It also notes that while succubi are imagined as enchantresses in modern times, in the old days they were “generally depicted as frightening and demonic." Smash those two descriptions together and you get Jynx, an unintentionally horrifying and “sexy” Pokemon.

(theory is not my)