Once believed to be nature spirits corrupted with pollution, Koffcko carefully monitor landfill sites, spreading word to other Pokémon when sites grow too large. They feast on buried rubbish and rise to the top by absorbing lighter-than-air gases.
It makes its nest in a giant tree in the forest. Getting up close to a Koffcko will give you a chance to observe, through its thin skin, the toxic gases swirling inside.