|Voice||Dee Bradley Baker|
|Appearances|| Operation: C.A.M.P.|
Bradley was a baby skunk that was discovered and adopted by Numbuhs 2 and 3 in Operation: C.A.M.P.. During the preparation for a mission to Camp Lemmeouttahere, the members of Sector V were preoccupied by their new pet, much to the disdain of Numbuh 1.
However, when the mission is carried out, Bradley saves the day by awakening Chester's brainwashed campers with his spray. Bradley is then made an honorary member of the Kids Next Door and dubbed "Numbuh 6".
In Operation: H.O.S.P.I.T.A.L., Numbuh 6 was hit by a car and mortally injured, while on an undercover mission to spy on Cree Lincoln. He was sent to a hospital which, by chance, was the base of Cree's current operations.
AbilitiesNumbuh 2 rebuilt Bradley as a cyborg, "R.O.B.O.B.R.A.D.L.E.Y." (Robotic Operative's Ballistic Odor-Blasting Rocket Armed Derrier Launches Extreme Yuckiness), who proceeded to defeat Cree in a one-sided battle.
Numbuh 6 also appears in Operation: S.I.X., in which he joins Numbuh 3 and Numbuh 2 on their supposed soda smuggling mission.
- Numbuh 6 is the only operative that has a mechanim design or is a skunk.
- Numbuh 6 is likely named after his voice actor, Dee Bradley Baker.