FusionDex

Darkzee become unwell if it eats a pleasant dream. While it can cause bad dreams, it seems to prefer to consume naturally occurring nightmares, and so will seek out restless sleepers at night.

If your nose becomes itchy while you are sleeping, it's a sure sign that a Darkzee is standing above your pillow and trying to eat your dream through your nostrils. It can lull people to sleep and make them dream.