Keys are a common item in many Nintendo games. They are used to unlock doors that players must pass through.
- Key (Mario) - Keys in the Mario series.
- Key (The Legend of Zelda) - Keys in The Legend of Zelda series.
- Key (Super Smash Bros.) - Keys in the Super Smash Bros. series.
- Key (Kid Icarus) - Keys in the Kid Icarus series.
- The Key - A Pikmin 2 treasure
- Gate Key - An item in Chrono Trigger
- Bike Key & Yakra Key - Different items in Chrono Trigger