Ghost (Wario Land 4)

Yūrei (幽霊 or ゆうれい) is an enemy in Wario Land 4 in the level Crescent Moon Village. Yūrei cannot be attacked or defeated by Wario, explaining his ghost-like appearance. It however, can't hurt Wario either. It mainly only steals Keyzer, the ghost that Wario needs every in order to advance trough the game and loose change on the ground. It will steal any type of coin, but will not steal gems or coins that float in the air. Yūrei only appears in the giant sections of Cresent Moon Village.

Trivia

 * His name refers to figures in Japanese folklore that are analogous to Western legends of ghosts.