It evolves into Dunseraph by leveling up while knowing the move Sky Fall, first learned at level 42.
(Note: Pokémon that evolve via moves must either know the move before leveling up, or learn the move upon leveling up. For example, a Pokémon that does not learn the required move but is taught it via the Move Expert in Venesi City must be leveled up again before it will evolve. It is also possible to breed offspring that already know the required move and will evolve immediately upon leveling up as long as the required move is not replaced.)
Its drill-tipped tail is used to burrow into the ground backwards. This Pokémon is known to make its nest in complex shapes deep under the ground.
Dunsparce resembles in some respects a serpent—it is, in fact, based on the tsuchinoko of Japanese lore. Its Japanese name, Nokocchi is actually created by switching the first and second half of tsuchi/noko. It does not have arms or legs. It has a yellow hourglass shaped body, two tiny wings on its sides, a drill-shaped tail (resembling that of a rattlesnake's), and two spikes under its chin. Its underbelly is blue, as well as the markings on its back. It also bears a slight resemblance to the Eurypterid. Dunsparce lives in caves and deep underground in nests of complex design. Its rudimentary wings enable it to hover just above the ground, providing it with an alternate method of locomotion besides crawling.
Not much other information is known about Dunsparce, probably because it is both very rare and timid. If it realizes it has been spotted, it rapidly burrows backwards into the ground using its tail drill and disappears out of sight.