A type of Durahan that wears a tall helmet with spines on the sides of its armor, and a black sword that glows red with energy when it's upset. It has been slightly redesigned over time, the most notable being its sleek new look when it appears as a non-playable level boss in Monster Farm Lagoon. It has a weakness to soil-type attacks.

In the Monster Rancher 4 and Monster Rancher EVO descriptions, it mentions that this is the armor worn by those serving the "King of Darkness." Since it mentions in My Monster Rancher that this period of history is lost to us, it is safe to assume that these warriors fought for Xevion.

Etymology Edit

Based on the Úlfheðinn (sometimes called a Berserker), mythological Norse warriors who fought in a nearly uncontrollable, trance-like fury (where we get the English word berserk). The Úlfhéðnar were said to wear the pelts of bears or wolves when they went into battle.


Game Description Image
Monster Rancher 4 "This knight swore allegiance to the King of Darkness and received great power in return. It has no sense of chivalry and commits all manner of brutal atrocities."
Monster Rancher EVO "A knight that has gained its power from the dark side by following the King of Darkness. It possesses none of the qualities of knighthood, and commits all sorts of evil and inhumanity." Berserker MREvo
Monster Rancher Advance N/A Berserker MRA
Monster Rancher Advance 2 N/A Berserker MRA2
Monster Rancher DS "This knight-like creature is said to have obtained negative power for helping the Dark King. It is in reality an anti-knight, carrying out numerous atrocities."
Monster Farm Lagoon Non-Playable Enemy Monster seen at the north and back sides of the Kunareya Ruins. Berserker MFL
My Monster Rancher "It has a thin, shell-like armor and is said to be from a time lost to history. It possesses tremendous strength, but the truth its past is unknown." Berserker MMR


  • To obtain a Berserker in Monster Rancher 4, use
  • To obtain a Berserker in Monster Rancher EVO, use
  • To obtain a Berserker in Monster Rancher Advance, use the password night.
  • To obtain a Berserker in Monster Rancher Advance 2, use the password AV5C.
  • To obtain a Berserker in Monster Rancher DS, use
  • To obtain a Berserker in My Monster Rancher, use