Y'know, I've never really considered any Pokemon truly creepy, not even the creepypasta-fuel stuff like Hypno or Darkrai. They have some dark lore for sure, but they and other mons with disturbing lore like Malamar have never freaked me out.
Galarian Corsola has completely changed that. When I saw that poor little frowning pale Corsola I was like "Jesus Christ, they can't possibly be referencing what I think they are referencing... ...it's a Ghost... ...oh my god they are actually referencing that." Like, I remember seeing the idea of a bleached coral Corsola passed around on Reddit a few months ago and thinking to myself "That's way too dark and tangible of a fear, Game Freak would never do that". And Cursola being this shattered coral ghost abomination with Corsola's face just trapped in that phantom mist, paralyzed in fear... ...That's some fucking Silent Hill shit right there. I honestly don't want this thing being OU-worthy just so I don't have to see this reminder of a horrible real-life ecological crisis interrupting my competitive creature-battling game, it's legit shook me that hard.