Drowzee

Drowzee puts enemies to sleep, then eats their dreams. Occasionally, it does get sick from eating bad dreams. In "Hypno's Naptime," our heroes come to a town where all of the Pokemon are sick and tired, and many of the town's children are missing! A sleep-wave tracking device constructed by Officer Jenny leads the group to a fancy high-rise apartment, where they find the cause of these problems — a Drowzee and a Hypno.

First appearance: Episode 27—"Hypno's Naptime"