Parascope

"I call it the Parascope, a tip-top device that detects and measures distant paranormal signals."

- Professor Elvin Gadd

The Parascope is an unseen device invented by Professor E. Gadd that is used to detect paranormal signals in Luigi's Mansion: Dark Moon. It allows him to track ghosts and locate areas of ghostly activity that he can then relay to Luigi via the Dual Scream's map. As more powerful ghosts are captured, E. Gadd can fine-tune the Parascope to enhance its detection capabilities, and as more pieces of the shattered Dark Moon are collected, he is able to pinpoint the locations of the other missing pieces more accurately.