1. Yamask 

Yamask carries a mask that is actually its face from when it was human. It is said to mourn its past life endlessly. 

2. Gengar 

Gengar, a ghost-type Pokémon, is said to lurk in the shadows, waiting to steal the life force of unsuspecting victims.

3. Mimikyu 

Mimikyu wears a disguise to hide its true form, which is believed to be so terrifying that it can cause illness or even death to those who see it. 

4. Banette: 

Banette is a discarded doll that seeks revenge on the child who abandoned it, making it a symbol of unresolved grudges. 

5. Drifloon 

Drifloon disguises itself as a harmless balloon but is said to snatch away children who hold onto it, taking them to the afterlife 

6. Cubone 

Cubone wears the skull of its deceased mother as a helmet, leading to questions about its tragic backstory. 

7. Absol 

Absol is often blamed for natural disasters, but in reality, it appears to warn people of impending danger, only to be misunderstood. 

8. Darkrai 

Darkrai is known as the Pokémon of nightmares, causing terrifying dreams to those who encounter it. 

9. Spiritomb 

Spiritomb is formed by 108 spirits trapped in a keystone, making it a ghostly entity with a sinister origin. 

10. Honedge 

Honedge is a possessed sword that drains the life force of those who wield it, making it both a powerful weapon and a cursed artifact.