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In The Wacky Wario Bros.: The Winning Ticket, the blooper starts with Wario sleeping in Mario's bed and Waluigi taking a bath in the house's shower, suggesting that they are homeless and secretly took shelter there.
Its most prominent appearances were in The Toadassass-ination, where Toad and other Toads play Mario Kart 64 while Mario, Luigi and Steve try to kill them, and Tubbie TV where the Teletubbies break into the house to hold Mario hostage and force him to watch their show.
List of Appearances
(Note: This list is incomplete.)