I noticed the lack of "classic" ghosts. Sure, Boos were in there, but they didn't have the shy traits...There have been dozens of ghost and undead characters in the Mario universe, like Erries, Dry Bones, Boney Beetles...and of course, the unforgettable "Boo Buddies" who shared various emotions/expressions. I was in a way, disspleased with the "new" ghosts.