Luigi's Mansion (location) - Super Mario Wiki, the Mario encyclopedia

Luigi's Mansion is a huge Ghost House constructed by the Boos that Luigi first encounters in the Nintendo GameCube game of the same name. Luigi wins the mansion in a contest that he did not even enter. When he gets there, Luigi finds that the mansion is haunted and that Mario has been kidnapped. Luigi
Luigi's Mansion is a huge Ghost House constructed by the Boos that Luigi first encounters in the Nintendo GameCube game of the same name. Luigi wins the mansion in a contest that he did not even enter. When he gets there, Luigi finds that the mansion is haunted and that Mario has been kidnapped. Luigi

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Luigi's Mansion (location), MarioWiki

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Theory: Luigi's Mansion is located on Mario Land in the Pumpkin Zone : r/Marioverse

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Luigi's Mansion (location), MarioWiki

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