FusionDex

Froafing spew a toxic foam from their bodies, covering their territories in it. When these Pokémon are sick, the foam they produce is no longer toxic, instead having a sanitizing effect similar to soap.

Getting up close to a Froafing will give you a chance to observe, through its thin skin, the toxic gases swirling inside. It protects its skin by covering its body in delicate bubbles.