In children's ghost stories, Sandysion is said to place its skull over a traveler's face like a mask, seizing control and leading them to drift endlessly through the desert until they collapse and disappear amidst the shifting sands.
When their brains, now divided in two, are thinking the same thoughts, these Pokémon exhibit their maximum power. It likes the shovel on its head, so Sandysion will get serious and fight any children who come to take it back.