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>Said to appear in decrepit, deserted buildings. He has no real shape as his body is made of gas. Despite lacking substance, he can envelop an opponent of any size and put it to sleep without notice. When exposed to a strong wind, a Gastly's gaseous body quickly dwindles away. They cluster under the eaves of houses to escape the ravages of wind.
>Gastly's genitalia float independently of the main body, attached to a small cloud of poisonous gas. This cloud can appear and disappear in the same matter as the main body. Some trickster Gastly like to hide in odd locations, revealing only their genitalia, to give a surprise to anybody who notices them.
The Gastly line doesn't deserve this.