Zubat is a nocturnal Pokémon, forming colonies in perpetually dark places, including mostly caves and old houses. During the daytime, Zubat sleep hanging upside down in dark places, avoiding sunlight at all costs. Daylight causes Zubat to become unhealthy, and prolonged exposure reportedly burns its skin slightly. Captured and trained Zubat, however, have been recorded as being much more tenacious in the daytime, even when directly exposed to sunbeams. At nighttime, Zubat swarms residential caves and terrorizes weary travelers with its repetitive, disorienting assaults. Zubat drops Rotten Flesh upon defeat.
Zubat evolves into Golbat at level 22.