[Name] Unknown (likely not named) [Source] Darkwing Duck, "Getting Antsy" [Symptoms] 
After the villain Lilliput uses a shrinking ray to shrink Darkwing Duck to microscopic size, the hero befriends two germs who help him "invent" a disease that makes Lilliput sick and easily subdued. The disease includes rashes, fever, and flu-like symptoms. Unfortunately, it turns out to be contagious, and at the end of the episode, makes the whole cast sick, including Darkwing.