From the Super Mario Wiki, the Mario encyclopedia
Hourglass is a Gaddget in Mario Party Advance. It can be obtained by completing the quest Boss Bowser. As the name implies, Hourglass can be used to measure time. Three hourglasses with different times are displayed; one minute, three minutes, and five minutes. The hourglasses flip after one side is completely empty. No buttons need to be pressed to activate or flip the hourglasses. Once one side of an hourglass becomes empty, the player can rotate the Game Boy Advance.
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