A Magical Detector.
Using the IR and Speaker of the Wii Remote, you point at the screen until you find a secret switch, at which point a noise will eminate from the remote, getting louder as you get closer. Then you use it, revealing the invisible object or enemy.
Using the IR and Speaker of the Wii Remote, you point at the screen until you find a secret switch, at which point a noise will eminate from the remote, getting louder as you get closer. Then you use it, revealing the invisible object or enemy.