Koffing

Koffing is a Poison-type Pokémon that can be found in highly industrialized areas. It is marked as #109 in the National Pokédex.

Pokédex Data
Koffing is a spherical Pokémon slightly larger than a basketball. It has purple skin, two narrow eyes and a wide mouth that is constantly smiling. Its body is covered in large pores that constantly expel toxic gases. Markings resembling a skull-and-crossbones symbol can be seen below its mouth.

Koffing can be found in polluted areas where it feeds on fumes given off by garbage and toxic materials. These toxins mix within its body and become a foul-smelling gas that is expelled through the pores covering its body. The gases are lighter than air, so Koffing constantly floats through the air. These gases are also quite volatile and can be ignited by open flames. Koffing's skin is also very thin and can be ruptured easily, causing it to explode.

Abilities

 * Smog - Koffing expels toxic gases that can afflict poisoning on an opponent.
 * Smokescreen - Koffing expels thick, black smoke to obscure an opponent's vision.
 * Sludge - Koffing spits a glob of black goo to blind and poison an enemy.
 * Self-Destruct - Koffing seals in its gases, inflating until it ruptures and explodes, sacrificing itself to inflict heavy damage on the opponent.

Evolution
In-universe, Koffing evolves in Weezing when two Koffing spend a prolonged period pooling their toxins in close proximity, eventually fusing together. In-game, Koffing evolves into Weezing at Level 35.