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 * The box cover of WarioWare: Twisted! (pictured) shows Wario holding a Game Boy Advance SP, but in the game, neither Wario nor any other WarioWare employee uses one. Instead, they use the original Game Boy Advance.
 * In Luigi's Mansion, after Nana has been captured in her room, the rocking of her chair can still be heard.
 * In Mario Kart: Double Dash!!, if Peach or Daisy activates the heart item after getting shrunken by a thunderbolt, the hearts circling the kart remain small when the kart reverts to normal size.
 * In Paper Mario: The Thousand-Year Door, the data disk that Princess Peach obtained from Grodus' room resembles the disks used for the Famicom Disk System. Also, the video that's displayed on Grodus' computer happens to be the BIOS screen for that system.