FurretTails

(check spoilers for some fun lore on these spooky pokemon!) 

 

Cubone
This pokemon wears the skull of it's deceased mother. When it thinks of its dead mother, it cries. Its crying makes the skull it wears rattle loudly. It's cries that echo inside the skull and come out as a sad melody. The stains on the skull the Pokémon wears are made by the tears it sheds. At night, it weeps loudly for its dead mother, but those cries only attract its natural enemy—Mandibuzz.

 Yamask 
These Pokémon arose from the spirits of people interred in graves in past ages. Each retains memories of its former life. Each of them carries a mask that used to be its face when it was a person. Sometimes they look at it and cry. It rambles through ruins, searching for someone who knows its face. Yamask can manipulate victims if they wear its mask through possessing their bodies.

 Spinarak:

It lies still in the same pose for days in its web, waiting for its unsuspecting prey to wander close. Spinarak's web can be considered its second nervous system, as it recognizes its prey by the vibrations it feels through the web's threads. Spinarak only come out at night; letting its prey suffer for hours if they get caught during the day, as it waits to devour them until it becomes dark. It's favorite prey to consume is Cutiefly!
 

Spinarak is based on the Theridion grallator, also known as the "happy-face spider", which has a similar coloration as well as having a face-like pattern on its abdomen.

SABELEYE:
An old story was told that if you look at Sableye while their eyes burn with a sinister glow, your soul will be stolen. However, evidence suggests that this Pokémon is actually very friendly, and they will only do mischief to travelers to win their attention. Their mischief makes them notorious, but in fact it is only because they stay in the caves for too long and eventually become lonely as a result.
 

Nonetheless, Sableye in Kalos and Alola are known to stalk Carbink in order to chew the gemstones off of them, but said food is often taken by Gabite before they could grab it. Notoriously, it has a natural rivalry with Mawile in most regions.
 

Sableye dig holes in cave walls and floors in search of gems and ore, which they crush with their razor-sharp teeth before eating. Minerals in the ore they eat crystallize on the surface of their bodies, forming various arrangements of gems that can differ between individuals. Sableye also move about very erratically, jittering and convulsing with every step as their heads twitch from side to side. This only adds to their eerie demeanors.


DRIFBLIM

 There’s a rumor that if you catch a Drifblim floating on the wind at dusk, you’ll be carried away to the afterlife. The raw material for the gas inside its body is souls. When its body starts to deflate, it’s thought to carry away people and Pokémon. Drifblim float anywhere the air current takes them, but groups have been known to disappear suddenly when spotted. It is more active at night than in the day.

CACTURNE: 
Cacturne become active in the dead of night, when desert temperatures often drop to near-freezing levels. They do this to prevent themselves from losing precious moisture in the hot, sweltering sun during the day. Cacturne hunt in packs, but aren't closely bonded with one another like most pack hunters; their relations are purely task-oriented without personal bonds. In their makeshift groups, Cacturne will follow weary travelers from far behind. If the travelers try and look behind them, the Cacturne will stop moving and pose as motionless cacti. Eventually, the travelers, already weary from the day's heat, will be overcome by paranoia and collapse onto the sand. It is only then that the Cacturne will approach and attack. Oftentimes, the only trace left after Cacturne attacks are piles of dry bones.
 

It is said that living thousands of years in the sandy desert has turned their blood into sand; although Cacturne “blood” is much thicker than that of most other Pokémon, since it is essentially their sap, it certainly is not sand, even though popular media likes to depict it that way.