Transmutational Brainwave Analyzer
From the Super Mario Wiki
The Transmutational Brainwave Analyzer is an invention that Kooky Von Koopa made. It appears in the The Adventures of Super Mario Bros. 3 and the episode, "Mush-Rumors". Due to an "alien" invasion in Mushroom Kingdom (which is in fact, that real-world humans accidentally drove into a Warp Zone that led them there), King Koopa wants to hear the aliens plans to conquer the Mushroom Kingdom. To King Koopa's surprise, they didn't transform from their "disguises" into actual alien monsters, and Kootie Pie screams that they are still trying to trick them. Kooky Von Koopa then proclaims that they will trick them.
Kooky Von Koopa then explains his device to King Koopa. This device, according to Kooky, will send waves of some sort to read their minds when the humans are attached to the machine via helmet. The Koopalings will then know all of the humans' secret plans to conquer the Mushroom Kingdom, then the Koopalings will then conquer Mushroom Kingdom using these plans.
After the family gets their mind read by Kooky's contraption, Mario and Luigi breaks in and turns off the machine, thus freeing the family. Then, a hesitant Kooky Von Koopa says that the analyzer did notice them as Real World people, and they did, after all, are going to an amusement park called Wild Waldo's One-of-a-Kind Amusement Park. King Koopa gets angry at this and shouts who started this and all Koopa Kids point at each other.