Data Disk

The Data Disk is a disc that the TEC-XX asks Princess Peach to get in Paper Mario: The Thousand-Year Door. The disk is in Sir Grodus's room, so Peach makes an invisibility potion to go in there and get the disk. She then puts it in to a conveniently placed computer, completing the task.

The Data Disk looks surprisingly like it is a game disk from the Famicom Disk System. In addition to that, the monitor shows the Disk System's BIOS when the princess inserts it into the computer.