Palace Key

Palace Keys are items found in the Paper Mario series.

They made their first appearance in Paper Mario, enabling Mario to unlock a door within the Crystal Palace. They are not to be mixed up with the Red Key and Blue Key, which are used in the same area, except this key is for the locked door after the use of the other two keys.

They also made a reappearance in the sequel, Paper Mario: The Thousand-Year Door, used in the Palace of Shadow with a redesign. They open a locked door in the entire area, except for the Riddle Tower, which is used by the Pedestal Keys. It also shares a strikingly similar appearance to the Pedestal Key as well.