Pokémon Coffing

If Coffing is worried, he increases the toxicity of his internal gases and emits them from everywhere from his body. This Pokémon can also create an overabundance of gases in the body and then blow them up.

Koffing contains toxic substances. The Pokémon mixes its toxins with raw debris, creating a chemical reaction that produces a powerful poisonous gas. The higher the temperature, the more such gas will be.