FusionDex

Bizee sneaks up to Bidoof dams at night and eats the dreams of the Pokémon sleeping within. It then gnaws on some of the outer logs of the dam, marking the dam as one it has successfully eaten from.

If your nose becomes itchy while you are sleeping, it's a sure sign that a Bizee is standing above your pillow and trying to eat your dream through your nostrils. With nerves of steel, nothing can perturb it.