The S.M.E.L.L.M.E.T. is a helmet used to block out nasty smells. It is a standard issue to all Kids Next Door operatives. It also appears to be able to work as a disguise.. It is made up of a strainer, goggles, two jars with coverings, and sunglasses. It was used by the Delightful Children in Operation: N.A.U.G.H.T.Y. to disguise themselves as Sector V. Other appearances in the series include Operation: S.H.A.V.E., Operation: C.A.K.E.D., Operation: R.E.C.E.S.S., and others. In Operation: V.I.D.E.O.G.A.M.E., the S.M.E.L.L.M.E.T. is needed to pass areas shrouded with green.