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Artwork of a Keyzer
Species Ghost
First appearance Wario Land 4 (2001)
“He looks like a pushover... Too bad he's not an enemy! I'm out here risking my life and he just sleeps all day! Hey! Keyzer! You'd better wake up and smell the coffee or I'm to smack you one real nice!!”
Wario, Wario Land 4 North American instruction booklet
The Keyzer unlocking the door to the next stage.

Keyzer[1], sometimes referred to as a Ghost Key[2], is a small levitating creature which bears some resemblance to a Boo, although with a key for a nose. They are seen in the Game Boy Advance game Wario Land 4, where one must be located by Wario in each of the eighteen stages. A Keyzer will always be found sleeping. Once found, it will wake up and follow Wario until he either loses all his health points or exits the level via the Vortex. The Keyzer will then unlock the sealed door that leads to the next stage, and will disappear once it does so. Once the door is unlocked, the Keyzer cannot be found within that same stage a second time.

If Wario exits a stage without finding the Keyzer, his points and any jewel pieces collected will still be counted, but he will not be able to progress to the next stage. Wario is able to re-enter any stage where the Keyzer has not been found.

The ghost, who has stolen Keyzer.

In the Crescent Moon Village stage, a ghost enemy shows an interest in a Keyzer, and excitedly tries to steal him from Wario. The ghost's movement will become faster after stealing the Keyzer, which may make it difficult for Wario catch him. Wario simply has to touch the ghost to retrieve the Keyzer, although the ghost will continue trying to steal it.

A Keyzer also appears in volume 28 of the Japanese manga series "Super Mario-Kun", on the page showing the chapter's end.


Names in other languages[edit]

Language Name Meaning
Japanese カギのはし[3]
A portmanteau of「カギ」(kagi, key) and「鴨の嘴」(kamonohashi, platypus)
Chinese 钥匙怪[4]
Yàoshi Guài
Key Ghost
French Keyser[5] -
German Keyzer[6] -
Italian Pellichiave[7] From pellicano (pelican) and chiave (key)
Spanish Dormillave[8][9]
Pájaro Llave[9]
From dormir (sleep) and llave (key)
Key Bird


  1. ^ Wario Land 4 European instruction booklet, page 23.
  2. ^ Nintendo Power Advance V.3, page 53.
  3. ^ Wario Land Advance: Yōki no Otakara Japanese instruction booklet, page 33.
  4. ^ iQue. 瓦力欧寻宝记. Retrieved February 2, 2017.
  5. ^ Wario Land 4 European instruction booklet, page 63.
  6. ^ Wario Land 4 European instruction booklet, page 43.
  7. ^ Wario Land 4 European instruction booklet, page 123.
  8. ^ Wario Land 4 European instruction booklet, page 103.
  9. ^ a b Official Wario Land 4 website (Guías Nintendo)