Bad key machine

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Bad Key Machine
ちょっとカギマシン Simple Key Machine
Artwork of the Bad Key Machine from the EarthBound Player's Guide
Type Key item
Appears in EarthBound

The Machine that Opens Doors, especially when you have a slightly bad key, or simply the Bad Key Machine, is a key item in EarthBound. It allows certain doors to be unlocked without a working key.


The Bad Key Machine is obtained from Maxwell after Jeff finds the bent key to be broken and unusable when he tries to open the lockers in the Snow Wood Boarding House. It can open any door, and is used to escape the underground area in Threed. After this usage, it has no more purposes. It can be used to try to unlock Dungeon Man while the entrance is still locked as well as the door to the traveling entertainer shack in Onett during the alien invasion, but it will only state that the key does not fit those doors.


Buying Selling
Not for sale Cannot be sold

In-game description


The "Machine that Opens Doors, especially when you have a slightly bad key" machine.

Where to obtain

Limited quantity Infinite quantity
Snow Wood Boarding House (Recieved from Maxwell after Jeff attempts to open a locker with the bent Key to the locker)


Bad key machine.jpg
Artwork of the Bad Key Machine from the Mother 2 strategy guide

Items of the EarthBound series
EarthBound Beginnings
Battle itemsCapsulesEquippable itemsKey itemsMiscellaneous itemsRecovery itemsStatus boosters
Battle itemsBroken itemsCapsulesEquippable itemsKey itemsMiscellaneous itemsRecovery items (condiments) • Status boosters
Mother 3
Battle itemsEquippable itemsKey itemsMiscellaneous itemsRecovery items