As Baliscon points out, terms like "fishbowl" and "waffles" are commonly associated with Mysterio's aesthetic, like a monster created for a C-grade creature feature. However, Big Bally-C gave him my favorite makeover so far.

This take on the master illusionist-stuntman-chemist-turned-hero-hunter has an almost alien/spaceman appearance, mixed with some robot for good measure, like something Superman would fight. The contrasting fabric/metal textures and swaddled dome make this fig creepy and confusing, and I like it.