Shinx is a quadrupedal, feline Pokémon resembling a lion cub or lynx kitten. Its front half is light blue, while the rear is black. There is a short tuft of fur on its head and smaller tufts on each cheek. The top tuft is smaller on the female Shinx. It has large, oval ears with yellow, star-shaped markings on the insides; yellow eyes; and a tiny, red nose. Whenever its mouth is open, small fangs can be seen in its upper jaw. A black marking encircles Shinx's neck like a collar, and there are yellow bands above its forepaws. The hind paws are black on the male Shinx and blue on the female. Spiked fur surrounds the base of its long tail, which is tipped with a yellow star shape.
Electricity is produced by the extension and contraction of muscles in Shinx's forelegs, which causes this Pokémon's fur to glow. If it senses danger, its fur can gleam brightly to blind predators so it can flee. Excited trembling is a sign that Shinx is generating tremendous amounts of electricity. It can send signals to other Shinx by shining the tip of its tail and shaking it. It has an aggressive nature; thus, taming a Shinx is said to take great patience.
In A Campus Reunion!, it was revealed that Clemont had befriended a Shinx in his youth. He evolved into a Luxio sometime after he lost contact with him, and he was caught by him when they finally met up again.
In The Rise of Darkrai, Dawn's Piplup got into a fight with a Shinx over a Pecha Berry in the garden. They eventually began a fight among most of the other Pokémon. Not too long after, they were calmed down when Alice started playing Oración. Shinx decided to split the fruit in half and share one half with Piplup.
Shinx's English name was originally thought to be "Spinx" because of a low-quality photo with its name on it.
Shinx is the only Pokémon with a base stat total of 263.
Shinx resembles a lynx kitten or a lion cub. It may have also been inspired by the mythical sphinx, as its short face, human-like ears, and cat-like appearance and name are similar. It may have also been inspired by the constellations Lynx or Leo, due to Shinx's cat-like appearance and the fact that it bears a signature star shape on the end of its tail. Additionally, the Lynx constellation got its name from the fact that only the lynx-eyed, that is people with very good sight, could see it, alluding to supernatural sight of lynxes.
Shinx may be a combination of shock, shine, or shining, and lynx or sphinx.
Kolink may be a combination of 子 ko (child) and blink or リンクス lynx.