Paper Marios slight redesigns of some enemies was always interesting to me. With boos being the most noticable, as it appears most boos, or at least the male ones have very pronounced eyebrows,tongue and teeth. The sunshine boos which may or may not just be paint are similar in style. Obv you know all of this but it sfunny to me this is how we got lady bow and the boo waitresses that we all love