Klink resembles two interlocking gears with six teeth each. The teeth of the gears are a light gray, with a darker central region. Each gear has a white "X" in place of its left eye, while their right eyes have a black pupil and white sclerae. They have round turquoise noses and small mouths. Klink can launch itself at opponents in the form of Gear Grind and Shift Gear, its signature moves. Once two bodies have joined, they cannot combine with any others or they will become separated. Klink generates its life energy by spinning, and is generally found in caves. According to Professor Juniper, the first recorded evidence of this Pokémon dates to around 100 years ago, in the Chargestone Cave; she believes that it suddenly appeared in the cave at that time.
Klink debuted in White—Victini and Zekrom and Black—Victini and Reshiram alongside Klang and Klinklang; they are all under the ownership of Mannes. He used the three for various tasks, such as powering the music machine at Eindoak Town's Harvest Festival, doing yard work on his property, and powering his helicopter in the climax of the films.
Klink is based on a pair of interlocking gears, more specifically either spur, helical, or herringbone gears. The Klink line's Shiny coloration may have been based on copper gears, since their noses have turned green as copper does when it oxidizes into such compounds as copper carbonate, forming a patina. Klink also resembles the simplest concept of the perpetual motion machine, as it is just two gears which repeatedly spin each other.
Klink is a corruption of clink (onomatopoeia for light metal striking a surface). It may also involve link, possibly referring to how the two gears are connected. It may also derive from the expression of two objects clinging on to each other and that they click.