Is that so... [Sounds like a headless horseman kind of tale, or like something he'd hear about a ghost Pokemon. But a headless spirit of death is kind of creepy to think about, and if he had been told this story back in Unova, he would have immediately doubted the authenticity of it...mostly due to his fear/denial about spooky supernatural things. But for all he knows, maybe it really is a real legend where Masaomi is from.]

I don't think we have legends about "Dullahans" where I'm from--usually our legends are based on the mythology surrounding rare Pokemon that are considered to have a "legendary" taste above other Pokemon.