FusionDex

Pluszee tend to gather around powerful Pokémon in the wild, supporting them in battles. At night, Pluszee devours the dreams born from those victories.

If your nose becomes itchy while you are sleeping, it's a sure sign that a Pluszee is standing above your pillow and trying to eat your dream through your nostrils. It has the trait of cheering on its fellow Pokémon.