Learn how to draw Boos from Super Mario Bro Games with the following drawing lessons with detailed steps. Boos, known as Teresa in Japan, are spectral beings with beady eyes, long tongues, and sharp fangs. The first appearance of Boos was in Super Mario Bros. 3, where they appear under the name Boo Diddly, a pun of Bo Diddley. Find the drawing lesson on the following page. Kids of all ages will love drawing him.