Numbuh 6

Numbuh 6 is the only operative that has a mechanical design, is a baby and is an animal (skunk). He is also the only example of 2x4 Technology applied to cybernetics. It is possible that Numbuh 6 attended the KND Arctic training facility and graduated between "Operation: C.A.M.P." and "Operation: H.O.S.P.I.T.A.L."