The Common Cold is a recurring antagonist of Codename: Kids Next Door. He is an eternally ill villain who wishes to spread his cold to everyone else in the world and uses a machine to fire mucus from his nose at his enemies. He is also the uncle of Anna Worthington.
The Common Cold first appears in Operation: T.O.M.M.Y., in which Numbuh Two's brother, Tommy, aids the Common Cold out of jealousy for the KND, building a machine for him that transforms him into the "Flu Bug". Numbuh Two's mother used chicken soup to counter the machine and defeat the villain.
The Common Cold never got a starring role in an episode again, but made several minor appearances.
- The Common Cold's weaknesses include chicken soup and Vitamin C. However, even though some products claim it does, Vitamin C does not treat or cure the Common Cold.
Adult Villains: Mr. Boss | Toiletnator | Mr. Wink and Mr. Fibb | Count Spankulot | Ice Cream Men | Gramma Stuffum | Stickybeard | Knightbrace | Common Cold | Mr. Fizz | Crazy Old Cat Lady | Professor XXXL | Chester | Mega Mom and Destructo Dad | Parent Teacher Organization of Eradicating Youngsters | Proper Patrol | Mrs. Goodwall | Mr. Mogul | Great Puttinski | Nurse Claiborne | Cheese Shogun Roquefort | Robin Food | Dodgeball Wizard | Black John Licorice
Child Villains: Madame Margaret | King Sandy | Six-Gum Gang | Interesting Twins From Beneath the Mountain | James Nixon McGarfield | Anna Worthington | Valerie | Henrietta Von Marzipan | Mushi Sanban | Windsor | Crayon Boy | Numbuh Infinity | Numbuh 48 Flavors