Dr. Mario/Characters

Viruses
The viruses have never been given any formal names, and are known simply as "Red Virus," "Blue Virus," and "Yellow Virus". The Nintendo Comics System (a series of comics produced by Valiant) included an issue called "The Doctor Is In... Over His Head," which depicts a story of Dr. Mario based on the original NES and original Game Boy titles. The comic names the blue virus "Chill," the red "Fever," and the yellow "Weird." These names were later used in Dr. Mario 64.

In the Super Mario Adventures comic, Mario dressed up as a doctor, but was pretending to be a psychiatrist. The viruses also made appearances as guests at Bowser's wedding.