[[File:TrappedMario.PNG|200px|thumb|left|Mario trapped in thehis portrait. in ''Luigi's Mansion'']]
Mario plays his third role as a captive during the events of ''[[Luigi's Mansion]]''. After Mario visitsarrives at a [[Luigi's Mansion (location)|mansion]] that Luigi has mysteriously won. There, [[Kinghe Boois (Luigi'soverpowered Mansion)|by [[King Boo]] overpowers Mario with his manyarmy of Boos and imprisonsis himimprisoned within a portrait. King Boo is apparently mad at Mario for harassing his kind during his past adventures. Luigi comesarrives at the mansion later toand discoverdiscovers why his brother didhas not comereturned. backWhile in the [[Bottom of the Well]] (accessed from the mansion's [[Courtyard (Luigi's Mansion)|courtyard]]), Luigi peers through the mouth of a lion statue and catches sight of [[Mario's Painting|Mario's painting]] on a wall at the far end of the [[Secret Altar]]. Luigi overcomesconfronts his cowardicefear of ghosts and captures allthe Boos usingand histhe [[portrait ghost]]s with a [[Poltergust 3000]] handed to him by [[Professor Elvin Gadd]]. After defeatingLuigi captures King Boo with the Poltergust 3000, Luigihe takesrecovers Mario's portrait and revertstakes himit to histhe original[[Portrificationizer formChamber]] usinginside [[Professor Elvin Gadd's Lab|professor's lab]]. After turning the last of the portrait ghosts and King Boo into paintings by E. Gadd's machine called the [[Ghost Portrificationizer]], E. Gadd then sets the machine in reverse to revert Mario back to his original human form. Mario is leftheard dizzyyowling in pain during the picturereversal process. After popping out of the machine, Mario is shown to be dizzy with a frame whileof a grate (where Luigi has previously attached the head of the Poltergust 3000 to release the portrait ghosts into the machine) stuck around his neck as Luigi, shedding tears of joy, laughs at him.
