Crystal Stars are items in Paper Mario: The Thousand-Year Door. There are seven of them, each one gained from a different boss, with the exception of the Garnet Star, which is obtained from the Posley Museum.
- Diamond Star: A white-tan star obtained by Hooktail, and gave Earth Tremor; opened up Boggly Woods.
- Emerald Star: A green star obtained by Magnus Von Grapple that gave Clock Out; opened up Glitzville.
- Gold Star: A golden star obtained by Macho Grubba that gave Power Lift; opened up Twilight Town.
- Ruby Star: A red star obtained by Doopliss that gave Art Attack; opened up Keelhaul Key.
- Sapphire Star: A blue star obtained by Cortez that gave Sweet Feast; opened up Excess Express.
- Garnet Star: An orange star that Smorg blocked, obtained at Poshley Heights; opened up X-Naut Fortress.
- Crystal Star: A rainbow star obtained by Magnus Von Grapple 2.0; opened up the Palace of Shadow.