>>54115977>>54116030>>54117036Scorched Slab is exactly what they intended it to be. It's a reference to an event in Japanese Mythology involving Amaterasu the Sun Goddess. It only seems useless to those who aren't familiar with the story it was made to refer to.
It's the equivalent of finding a cave in Unova (or some other American-inspired location in the Pokeverse) called 'Johnny Appleseed's hideaway' and finding it only contains a Sweet Apple and Tart Apple item - the reference makes perfect sense to anyone familiar with the local mythology, but seems utterly useless, random, or 'incomplete' to anyone who is either a foreigner or is unfamiliar with the old folktales.