You need to know a little about the pokemon razz 
Misdreavus ( Mūma?, Muma in original Japanese language versions) is a fictional, ghost-like entity in the Pokémon franchise.
The name Misdreavus is a portmanteau from the words "mischievous", which refers to its naughty nature, and "dread".
Another possibility is the name originated from the word "mysterious", indicating the Pokémon's little-known background which is common to all Ghost-type Pokémon. It may also be a portmanteau of "mysterious" or "mischievous" (given its nature) and a variation of the words "dread" or "dream". Its American name was originally going to be "Trillix". [1] Its Japanese name "Muma" may come from the Japanese word meaning "nightmare".
Biological characteristicsMisdreavus is a moderately-sized, corporeal apparition that somewhat resembles the disembodied head of a human female (though this Pokémon exists in male and female gender). It lacks a nose, has thick, flowing “hair”, and large, yellow eyes with red irises. It appears to wear a necklace of red pearls.

Misdreavus lives deep in dark caves, making it an elusive Pokémon. It projects frightening screeching and wailing noises, as well as creepy, sobbing cries, at enemy Pokémon it encounters in the caves, so as to build up a level of fright strong enough so that the Pokémon will flee. Misdreavus’ pearl necklace apparently serves as its means for feeding by absorbing the fearful feelings of targets for nutrition (compare with Shuppet, a similar Ghost Pokémon that feeds on feelings of anger).
In the event that a human, trepid or otherwise, enters a cave area inhabited by a Misdreavus, the Pokémon will attempt to drive him or her out by biting and pulling at the intruding human’s hair.
Because of its wailing habit and feminine appearance, Misdreavus may be representative of the Irish Banshee.