Misdreavus and Mismagius

Misdreavus
The Screech Pokémon
Type: Ghost
Official Registration #: 200
Entry: A small banshee pokémon native to the forests of Sinnoh and the mountains of Johto. Mischievous by nature, misdreavus enjoys sneaking up on humans and either playing pranks on them or startling them with their sob-like cries. Misdreavus then feed on the ensuing fear it generates through its necklace-like orbs. In centuries past, misdreavus were common in the Johto region, to the point where locals created elaborate myths concerning women whose heads would come and terrorize their villages as they slept to explain the origin of misdreavus infestations. This may seem a little silly in modern times, but considering this is the same region that believed in giant bellsprout and sentient umbrellas, this is possibly the most mundane pokémon-related folklore its people had come up with.

Mismagius
The Magical Pokémon
Type: Ghost
Official Registration #: 429
Entry: The evolved form of misdreavus, by exposure to dark stone. Mismagius possess hypnotizing cries, which it uses to mesmerize prey. Chanting from just one of these pokémon may induce extremely realistic hallucinations—both terrifying and dreamlike—that can last for hours after the departure of the subject in question. Needless to say, mismagius tends to be a popular alternative to hallucinogens among the more open-minded youth and subcultures of the world … not that the author would know anything first-hand about that, as he most certainly has never engaged in anything mind-altering in college.