It is not known to evolve into or from any other Pokémon.
It is one of the Ultra Beasts and is known by the code name UB-04 Blade (Japanese: ＵＢ０４ Ｓｌａｓｈ).
Kartana is a small Ultra Beast that resembles an origami human. It appears to be folded out of a sheet of paper which is white on one side and red on the other. Its head is folded slightly inside its body and has a four-sided star in the center, but no discernible facial features. On top of its head are two short antennae or horns that are wider at the top. It has long, thin arms that resemble katanas with a yellow, sheath-like structure around the upper area. The sheath connects to a red, slightly raised hexagon on its torso. Extending up and out from the base of each sheath are three yellow projections that are nearly as long as its arms. Its legs appear creased with areas of red visible along the edges. Its light, thin build makes it one of the lightest Pokémon, tying with Gastly, Haunter, Flabébé, and Cosmog.
Despite its small size compared to the other Ultra Beasts, Kartana is extremely dangerous, as every edge of its body is incredibly sharp. It is able to cut down a gigantic steel tower with one stroke of the blades on its arms, and any opponents that try to attack it will be similarly cut apart. According to Wicke of the Aether Foundation, its light, paper-like body allows it to evade most attacks by simply floating out of the way, but it also makes it highly vulnerable to fire and moisture. For a brief time, it was the only Pokémon that could learn Cut by leveling up.
Despite being called "UB Slash" in Japanese, Kartana cannot learn the move Slash.
Despite being a Steel-type Pokémon, Kartana cannot learn any Steel-type moves by leveling up.
Kartana may be based on origami and samurai. In particular, it may be based on noshi, a ceremonial origami attached to gifts for congratulatory occasions as a token of good luck, or shikigami, paper figurines cut into the shape of a person or animal and imbued with spiritual power, often used by priests to ward off negative energy. Its sharp, paper-like qualities may be a reference to paper cuts.
Kartana may be a combination of katana and charta (Latin for paper). It may also involve Curtana (British ceremonial sword used at the coronations for kings and queens) and कर्तन kartana (Sanskrit for cutting).
Kamiturugi may be a combination of 紙 kami (paper), 神 kami (deity), and 剣 tsurugi (sword).