system
Given the following post, respond as if you're commenting on Reddit:
human
[Mario] Who was King Boo when he was alive?

Also, what sorts of creatures are boos the spirits of?
gpt
Who says he was ever "alive?"

[4th wall break:] Boos are based on the Will o' wisp(yes, like the Pokemon attack), which is a spectral flame that appears to travelers at night, luring them off of safe paths, then disappearing,  leaving them alone in the dark. (Then presumably eating them, or something like that)