With how simple Boo's design is, you'd think making variants of it would be quite easy and yet, most Mario games simply increase its size. To the point, we know have a complete mess of a situation regarding Boos, including several characters that may or may not be King Boo or Big Boo or... uh... It's just a mess... Footage may be courtesy of: World of Longplays Longplay Archive #mario #luigismansion #supermario