Weavile is a bipedal Pokémon with a pale, gray body that resembles both a cat and a weasel. It has a bright red crown and collar made of wide feathers and a single, thinner feather on each ear. The ear feathers are smaller on a female Weavile. Weavile has two tail feathers and three claws on each paw. There is an oval, yellow gem-like protrusion in the center of its forehead. Its eyes are red with three eyelashes, and four fangs protrude from its upper jaw. Weavile is distantly related to Sneasler from the Hisui region.
Weavile live in snow-covered areas and are notorious predators. Weavile is famed for its speed and agility. Weavile is also known for its intelligence and cunning nature, thanks to its brain having developed as it evolves from Sneasel. A scratch from Weavile's sharp claws can cause frostbite. Weavile travel in packs of four or five, with one of them acting as the pack leader. They hunt for prey such as Alolan Sandshrew, Alolan Vulpix, and even larger species like Mamoswine, then divide up the prey amongst themselves. Weavile can communicate with each other by carving patterns into trees, ice, and boulders, with over 500 distinct signs recorded.
Weavile physically debuted in Team Galactic's Conspiracy, Revealed!!, under the ownership of Cyrus. He sent out Weavile to battle Hareta, who fought back with his Piplup. Weavile proved to be a very dangerous opponent, even blasting Piplup off the bridge (where the battle took place) with its Hyper Beam. However, Piplup was able to use its Torrent to turn things around and defeat Weavile with a powered-up Surf.
Pokémon Mystery Dungeon: Explorers of Time and Darkness
When Weavile is released from a Poké Ball, it dashes from side to side and uses False Swipe. It also dazes the opponent.
"A Sharp Claw Pokémon. The crown on its head resembles a fully opened folding fan. Its sharp, hooked claws and outstanding speed are its most memorable features. It's one of the Pokémon that can be expected to perform well in the front lines of a battle. There are many Trainers who teach it the TM False Swipe and travel with it to catch rare Pokémon."
Weavile weighs as much as Dawn. It shares this similarity with Porygon-Z.
Weavile can be seen as a parallel to Gliscor. Both were introduced in Generation IV, both of them are dual-types, have the same base stat total, have Special Attack as their lowest stat, have double weaknesses (Gliscor to Ice, Weavile to Fighting), evolve from Pokémon that were introduced in Generation II, and do so by leveling up at night while holding items that contain the word "razor" (Sneasel evolves with Razor Claw, whereas Gligar evolves with Razor Fang).
Weavile may be based on the kamaitachi, a type of yōkai often represented as weasel demons with sickles on their front legs and sometimes understood as the cause of mysterious cuts on the skin, especially in cold weather. It also shares some traits with cats and weasels. Its appearance may be based on ancient Egyptian fashion, as it includes what resembles a headdress, collar, and earrings similar to what Egyptian deities wear. Its "eyeshadow" also resembles Egyptian makeup. The feathers on its head may also be inspired by Native American war bonnets.
Weavile may be a combination of weasel, weave, evil, and vile.
Manyula may be a combination of 魔 ma (demon), マニューバ maneuver (referring to its cunning), and ニューラ Nyula (Sneasel).