It's a ghost type attack.
These aren't in order: Dream Eater Dark Void Dark Pulse Nightmare Double Team Night Shade Disable Quick Attack Hypnosis Pursuit Haze Embargo
Of course they do! Also, dark is super-effective on ghost.
Psychic Pokemon are weak against Ghost, Bug and Dark type attacks, If you are using a Ghost pokemon, be sure to know that Night Shade isn't Super Effective since it always takes the same amount of damage as the level of the Pokemon that uses it.
Because of peace and dark around.
Morty has ghost-type Pokemon, it's best to use a Pokemon that know's a dark type attack. Ghost Pokemon do not have many weaknesses but dark is strongest against them.
Dark type moves such as night shade,shadow punch,etc.are super effective against dark Pokemon.
Ghost and Dark.
The Weimaraner is sometimes nicknamed the ghost dog or grey ghost because of the colour of its coat and it's shinnyish appearance in the dark
It is a black tulip, but black tulips do not exist. So the black tulips are a deep dark shade of purple, in which stands for Queen of the Night.
use a dark type Pokemon or attack(shadow ball is the best)
Ghost and Dark-type Pokemon are super effective against Ghost types.
Dark and ghost.