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The Holo-Peach is a type of messaging system found in Paper Mario: Color Splash. It is used in the form of a greeting card with a built-in hologram projector that shows a hologram of Princess Peach. After Peach gets kidnapped by Black Bowser, she sends Mario these Holo-Peaches detailing information on Black Bowser's plans while in captivity. There are seven Holo-Peaches in all throughout the game.
Locations of Holo-Peaches
Princess Peach's Messages
Names in other languages