Kotsuheri

Skullcopters are obstacles that Wario encounters in the Wario Land series. They are small spiked objects with an imprinted skull emblem and a propeller that allows them to hover in the air. Judging by their skull-symbol, they are affiliated with Captain Syrup's Black Sugar Pirates, a band of thieves that act as Wario's rivals throughout different games.

Role in Wario Land 2
Skullcopters only appeared in Wario Land 2 so far. In this game, they are mostly encountered in areas with narrow platforms with many pits, or in level segments in which Wario needs the help of an Owl. Some of them float slowly from one point to another, while other ones circle in the air with much faster speed. They are invulnerable and will make Wario lose Coins and his footage upon contact. They will also scare Wario's owl away if he has one while taking damage.