In Luigi's Mansion: Dark Moon for the Nintendo 3DS, Toads are Professor E.
If the Player uses the Game Boy Horror on Toad, Luigi says. The third is in the Washroom (1F), and the last Toad is located in the Courtyard. The second is located on the Balcony (2F). But they are either too scared or don't know where to look, so they help the player instead so they can save Mario for them, or give them advice and tips about Mario's location or about the mansion itself. In Luigi's Mansion, several Toads are in various areas of the mansion, they are here on a mission to save Mario from King Boo. Unfortunately, they greatly admire Mario over Luigi and even tend to underestimate the green clad hero.
Toads are the citizens of the Mushroom Kingdom, who constantly call on Mario and Luigi for help, whenever their princess, Peach, is captured or their kingdom and people are in trouble.