The control room is a location in Problem Sleuth. It is reached by exiting Pickle Inspector's office through the window and then taking the elf elevator up.
Inside the control room are several interesting items. First, a Code Machine with the ability to alter the game's state by entering numerical codes found throughout the game world. Second, a map of the four kingdoms hanging on the wall. Third, a strange hatch in the ground. Fourth, a control panel along one of the walls containing three monitors tuned into each of the Team Sleuth's offices. Finally, a ridiculously complex puzzle is constructed along the back wall.
The control room was destroyed however when Pickle Inspector placed two windows inside one another and activated the hatch. The resulting pressure was enough to fill the Fractal Prospectus and cause a large explosion, killing both Pickle Inspector and the Honeybee Professor.