Almost invisible, this gaseous POKéMON cloaks the target and puts it to sleep without notice.
Said to appear in decrepit, deserted buildings. It has no real shape as it appears to be made of a gas.
With its gas-like body, it can sneak into any place it desires. However, it can be blown away by wind.
Its thin body is made of gas. It can envelop an opponent of any size and cause suffocation.
It wraps its op ponent in its gas- like body, slowly weakening its prey by poisoning it through the skin.
— Pokédex entries (via PokeAPI)