The house was a mirage created by King Boo to lure Mario and Luigi into his grasp so that he could capture them. Gadd, who reveals to Luigi that his brother, Mario, has been taken captive by King Boo. Perplexed by this information, Luigi makes his way toward the house, where he eventually encounters Professor E. During the game, Luigi gets a notification informing him that he has won a prize for his own home, even though he did not even enter the competition. Nintendo is the developer and publisher of the action-adventure video game Luigi’s Mansion.