The Garnet Star is the sixth Crystal Star, found at Detective Pennington's home, the Poshley Sanctum in the game Paper Mario: The Thousand-Year Door. This was hidden in the painting at the Sanctum while a red herring— a fake one— was put out in the open to fool the Shadow Sirens and Bowser and his followers (only Bowser and Kammy weren't fooled— Pennington told them the Crystal Star they grabbed was a red herring). This Crystal Star will teach Mario the move "Showstopper".
| Crystal Stars |
|---|
| Diamond Star | Emerald Star | Gold Star | Ruby Star | Sapphire Star | Garnet Star | Crystal Star |