The Destructively Nefarious Kids are the counterparts of the Kids Next Door who exist in a mirror universe where everything is the opposite of the way it is in the regular universe. They are seen in Operation: P.O.O.L. The Destructively Nefarious Kids are devoted to tormenting children everywhere and rule their world with an iron fist. At the end of Operation: P.O.O.L., the DNK change their ways and help kids instead of punishing them. Negative Numbuh 4, the original DNK supreme leader, was also sentenced to the broccoli mines for his crimes against the Negaverse.