The Cavity Cave is Knightbrace's base of operations, which only appeared in Operation: V.I.D.E.O.G.A.M.E.
History[]
After Numbuh 3 saves the fireflies from the School Clock Tower, the fireflies point an arrow to the Cavity Cave where Numbuh 1 goes in to stop Knightbrace's Bug-Brite operation and faces and defeats Knightbrace.
Trivia[]
- Although this location was only seen in Operation: V.I.D.E.O.G.A.M.E., it was mentioned in "Operation: G.I.R.L.F.R.I.E.N.D.".