after getting all the Skull Teeth and unlocking the entrance to the Land of the Livid Dead, you see a bunch of coffins and skulls, it resembles a graveyard (hence the name)

after looking a round for a bit, you see an old lady with an undead appearance slowly walking towards you

"Why You Little- Oh! Did I scare you? You better not be one of that Limbless Brat's Friends!"

she said in a very cranky tone