Mad Scientist is a character trope that revolves around a scientist who uses their knowledge for evil or utilizes villainy to support their research. Because of the different homages, references, and practical writing necessities in media featuring these characters, the trope has a consistent visual aesthetic.

The primary visuals associated with mad scientists are their laboratories, which feature a simultaneously ominous and campy atmosphere. Technologies in the lab are designed to look confusing, imposing, and cartoonish. The results of their experiments are also a frequent and reliable visual aspect. Neon green is the color most commonly associated with mad scientists.

Note, because the list of Mad Scientist characters is extensive, please include media where the mad scientist is central to the narrative and has the aesthetic.