After entering the far left door in the Warehouse, Luigi enters the Workshop, a smaller room similar in materials to the Warehouse. Upon entering it for the first time in mission C-1: A Timely Entrance, Luigi witnesses two Greenies with welding masks and hammers working on a Giant Robotic Bomb. When the bomb is flashed with the strobulb, it explodes; stunning the Greenies and allowing Luigi to capture them with ease. There are no Gems or Boos in the Workshop. No other Ghosts appear in the Workshop with the exception of a Greenie and Polterpup in mission C-4: Play Catch.