Joltik's size compared to a Beartic. Joltik is next to Beartic's underarm.
Physiology
Joltik are yellow, furry mite-like Pokémon, and are small, being the smallest known Pokémon. They have blue eyes, two of which are occeli. They have two face-down points for a mouth, and their four limbs are tipped with blue.
Joltik cling to larger Pokémon, sucking up static electricity and storing it in a special pouch. Some Joltik also suck up electricity from household plug sockets.
Habitat
Joltik commonly live in caves and near Galvantula. Joltik have also been known to live in cities.
Joltik first appeared in Oshawott's Lost Scalchop!, where a wild Joltik was accidentally mistaken as Ash's Oshawott's missing scalchop. When Oshawott put it on his stomach, the angry Joltik started to shock Oshawott until it was taken off.
Joltik and Galvantula are the only Pokémon capable of having the Unnerve Ability that do not have it as their Hidden Ability.
Joltik is the only Pokémon that has a base stat total of 319.
Origin
Its Pokédex entry states that it latches onto to larger Pokémon to drain the static electricity off them, so it may be based on a tick, though its size seems to imply it is based on a mite. Like its evolution, it is also based on a tarantula, or a jumping spider.
Bachuru may be a combination of バチバチ bachibachi (onomatopoeia for electric crackling) and タランチュラ taranchura (tarantula). It may also be a combination of bug and 虫 chū (bug, an alternate reading of mushi).