I'm currently making an edit for the Wario Land 4 soundfont that makes finding instruments less of a pain. Here's an mp3 of the test for the edits I've made so far.
...Obviously, the test was to see the different bank/preset assignments in action.
I always thought that it was supposed to be the opposite of Mario's eyes-- he has a blue ring around his pupil with the white encroaching it, Wario has white with blue surrounding it. In other words, the blue and white (sort of) switch places