Belome
quoting myself elsewhere:
it’s weird enough when he attacks you in the sewers but then later you find yourself in a temple devoted to him??
it comes out near Monstro Town so presumably they worship him… Belome is some kinda eldritch god who lives beneath the Mushroom Kingdom, and he either turns you into a scarecrow or just eats ya
also i usually pronounce his name “be-loam” (he lies below-m) but it just occured to me “bellamy” also works (it’s like belly! he eats ya!) and i like how cute it sounds lol