Key

There are dozens of different keys for castles and fortresses all across Mushroom World.

Super Mario Bros. 2
Super Mario Bros. 2 is the first Mario game with keys and locked Doors. Phantos will always be guarding keys, so if the player drops a key or unlocks a door, a Phanto will be chasing the player. Keys are always in view -- never under a Vegetable.

Super Mario World
In Super Mario World, the Keyholes would turn into a gigantic portal when a key came into contact with it.

Super Mario World 2: Yoshi's Island
In Super Mario World 2: Yoshi's Island and its sequel the keys unlocked doors, but when a castle boss was defeated a large key would appear and act the same as ones in Super Mario World.

Paper Mario
There are many key designs in Paper Mario and its sequel, but each only opens doors in the area they are found. There are Castle Keys for every castle and fortress, and various others keys in different locations. In Paper Mario, they were used in Tubba Blubba's Castle, Bowser's flying castle, and Peach's Castle. Tubba Blubba's keys look like three leaf clovers, while Bowser's look like a gold three leaf clover with a blue ball in the middle. There are about three of Tubba's keys and five of Bowser's keys. Peach's Castle Keys are pink versions of Bowser's. Also, a living key called Yakkey locked the Gusty Gulch Windmill.

Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, the Castle Keys that open the doors in Hooktail Castle are shaped like flowers. In Super Mario RPG: Legend of the Seven Stars, there are two types of Castle Keys: Castle Key #1 and Castle Key #2. They are listed as Special Items. There is also a Grotto Key, which opens a door in the Pirate's Grotto

Luigi's Mansion
In Luigi's Mansion, Luigi had to collect many keys before he could advance to other rooms. They were usually found in Treasure Chests, although some could be found right out in the open.

Mario Party series
Bowser owns various keys in the Mario Party series. These so-called Bowser Keys are usually found in Bowser Mini-Games, and are necessary to escape from Bowser. In earlier Mario Party games, Bowser Keys are simply keys shaped like Bowser's head. In later games, they are engraved with Bowser's likeness.

Super Smash Bros. Brawl
In the Subspace Emissary mode of Super Smash Bros. Brawl, Emissary Keys are found somewhere near locked gates. If the player finds a key and tries to go through the gate while having it in his or her hand, the gate will become unlocked.

Notable Keys

 * Yakkey