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A Red Potion is a special item in Paper Mario: The Thousand-Year Door. This item is something left over from the X-Naut lab technicians that Princess Peach used, with three other potions (Green Potion, Orange Potion and Blue Potion) under TEC-XX's advice to make herself invisible to sneak into Sir Grodus's room to steal the Data Disk for info that TEC-XX required.
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