Weezing

Weezing, known in Japan as Matadogas (ニャース, Matadogasu) is a Poison-type Pokémon that was introduced in Generation I. It evolves from Koffing starting at level 35. It is one of the Pokémon that can be released from a Poké Ball in Super Smash Flash 2.

Pokémon description
Weezing is a purple colored Pokémon known to be formed of two heads of different sizes, in which they are connected by a tube. The right head has a light yellow circle on your head and two teeth in each corner of its mouth, while the left head has two flat teeths in your upper jaw, two pointed teeth from its lower jaw and a cream-colored skull-and-crossbones marking on your head. Weezing has holes in both heads, which they release different gases in each head that mix by inflating one head and deflating the other and turning the pokémon even more toxic. Also, probable due to gases lighter than air, Weezing can hover in midair and its gases can be used to make top-grade perfume by diluting them to the highest level. It lives in urban areas and feeds on the dust, microorganisms and especially gases emitted by garbage during the night, when the people are asleep.

In Super Smash Flash 2
Weezing is released from a Poké Ball and performs the move Smog. Once it is released, Weezing executes the move exactly as it does in the original Super Smash Bros. Melee, letting a cloud of gas out of the holes in your body. If the opponent makes contact with its attack, it will take damage and a low knockback, having the risk of getting stuck in the center of Weezing's attack and being injured until it disappears.