FusionDex

At night, Mewzee uses its psychic power to find children having nightmares. It teleports to their side and eats the disturbing dream, allowing the child to sleep peacefully.

If your nose becomes itchy while you are sleeping, it's a sure sign that a Mewzee is standing above your pillow and trying to eat your dream through your nostrils. A Mewzee is said to possess the genes of all Pokémon.