Not to be confused withCard Key.

Security Key
The Thousand-Year Door description	A card key that opens a door in the X-Naut base.
The Thousand-Year Door (Nintendo Switch) description	A card key that helps open a door in the X-Naut Fortress.

TheSecurity Key, originally known as theCard Key, is an item found inPaper Mario: The Thousand-Year Door, where it is used to access certain areas in theX-Naut Fortress on themoon. TheGrodus room to the right of Sublevel Two has a green Security Key on the computer table. The electrical-floor room to the left of Sublevel Two guards a pink Security Key. The electrical-floor room to the left of Sublevel Three guards a yellow Security Key. They are necessary to open the door to the factory room to the right of Sublevel Three. The factory also contains a blue Security Key to allow the player access to the bossMagnus von Grapple 2.0.

In the remake, the cards are distinguished by symbol: blue has a club, pink has a diamond, green has a heart, yellow has a spade, and a new purple star-symbol card has been added. Four Security Keys are now required to access the factory. As a result, the blue Security Key is now found in the restroom of Sublevel Four, and the player must defeat a lone Elite X-Naut to obtain it. The new purple Security Key therefore replaces the blue Security Key in the factory.

Names in other languages[edit]

• Cards
• Keys
• Paper Mario: The Thousand-Year Door special items

• Articles with unsourced foreign names