Jailkeeper MR4

A solitary breed of Golem that has stony, armored skin and black and silver metallic plates grafted to it for extra protection. Its immense power makes many protest its use in Monster Battles, saying that it should only be used in extreme circumstances.

Etymology Edit

So-named because it is a prison guard.


Game Description Image
Monster Rancher 4 "Scholars explain that it loves the dark because it was originally developed to be a prison guard. It actually feels uneasy in bright, sunny places."
Monster Rancher EVO "Scientists believe that the reason that it loves the darkness is because it was given birth to fulfill its purpose as a prison guard. Its fondness for darkness is its legacy." Jailkeeper MREvo
Monster Rancher Advance N/A Jailkeeper MRA
Monster Rancher Advance 2 N/A
Monster Farm DS Jailkeeper MFDS
Monster Rancher DS "Jailkeeper is drawn to darkness. Scholars explain it was created this way so it could work as a prison guard. It may not be cheerful, but it has a very calm demeanor." Jailkeeper MRDS
My Monster Rancher "This combination of Golem and Zan might just have the power to destroy all monsters. A more powerful physique and glowing red eyes make this monster more impressive than even the standard Golem." Jailkeeper MMR


  • To obtain a Jailkeeper in Monster Rancher 4, use
  • To obtain a Jailkeeper in Monster Rancher EVO, use
  • To obtain a Jailkeeper in Monster Rancher Advance, use the password GTA3.
  • To obtain a Jailkeeper in Monster Rancher Advance 2, use the password AAAAAA.
  • To obtain a Jailkeeper in Monster Farm DS, use
  • To obtain a Jailkeeper in Monster Rancher DS, combine a Golem (main) and a Zan (sub).
  • To obtain a Jailkeeper in My Monster Rancher, use


For more pictures and screenshots of Jailkeeper, click here.

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