The Clock Tower Gate is the gateway to the Movements room, which leads to the Belfry Clock in the Old Clockworks of Luigi's Mansion 2.



Luigi seeing the gate from the floor above it

When Luigi first enters the Old Clockworks, he sees that the clock hands and the rotor are missing, then E. Gadd contacts and told him that the ghost are so smart that they're trying to hide them in order to prevent Luigi from going through the gate. In C-Boss "Showtime", Luigi repairs all of the gears back to the gate and can proceed to the movements. In C-4 "Play Catch", JambooLaya can be found here.