ThunderCats wiki

The Mutants are barbarians from the planet Plun-Darr who constantly wage war against the ThunderCats both on Thundera and Third Earth.


Upon arriving on Third Earth, the Mutants encounter a wizard by the name of Mumm-Ra who buries the Mutant Mothership beneath the desert sands as a demonstration of his power.  The Mutants respect Mumm-Ra's sorcery and agree to cooperate with him to defeat the ThunderCats, but Slithe notices that Mumm-Ra has a critical limitation in that he requires time to recharge in his sarcophagus.  Thus, the Mutants frequently act independently of Mumm-Ra.

The Mutants enslave a race of beings known as Brute-Men in order to construct Castle Plun-Darr and terrorize natives of Third Earth to plunder their resources, wreak havoc, and provoke the ThunderCats.  However, the ThunderCats prove to be formidable adversaries and the Mutants soon revisit Mumm-Ra to request he raise their spaceship from the desert for salvage purposes to help them compete with ThunderCat technology.  This enables Vultureman to develop several vehicles for the Mutants: the NoseDiver, the SkyCutters, the Flying Machine, and the Fistpounder.


  • Slithe - leader of the Mutants; opportunistic, cunning, and skeptical
  • Jackalman - assistant Mutant
    • Jackalmen
  • Monkian - assistant Mutant; his ability to quickly navigate the jungles helps Mutant espionage
    • Monkians
  • Vultureman - inventor, mechanic, chemist; he provides the Mutants with technological support; he's not as core to the group as the other three but he's a regularly recurring character with his own quarters in Castle Plun-Darr
  • Ratar-O - domineering Mutant commander; captain of the Ratstar, a Mutant spaceship
  • Ratilla


Note, many weapons were only seen briefly with characters, so in those cases they were chronicled on Mutant Weapons.

  • Mutant Crossbow
  • Ball and Chain Flail
  • Basic Mutant Shield
  • Cannonball
  • Morning Star
  • Club
  • Spiked Club
  • Mutant Spear
  • Staff
  • Stick
  • Single Sided Axe
  • Halberd Axe
  • Viking Axe
  • Plain Sword
  • Falchion Sword (Jagged Curved Sword)
  • Scythe
  • Pitchfork
  • Bolas
  • Mutant Blaster
  • Net Gun
  • Cannon shield
  • Warp Gas


  • Mutant Mothership - the Mutant spaceship; salvaged to create other vehicles/technology
  • Mutant Ship
  • NoseDiver - a hovercraft with amphibious capabilities; the favored vehicle of Slithe
  • SkyCutters - light aircraft used by the Mutants
  • Flying Machine - large aircraft; Vultureman's favored vehicle
  • Ratstar - Ratar-O's spaceship; it crashes and is salvaged for various parts but later is restored
  • Mutank - a ground vehicle created from salvaged Ratstar parts
  • Fistpounder - a heavy ground vehicle created to oppose the ThunderTank; Monkian debuts this vehicle


Continuity Errors

During the first season, the mutant races seem to disappear and reappear based on the episode. The status of the races is even in conflict from episode "Exodus" to "The Unholy Alliance". During the events of "The Unholy Alliance", the Mutant Mothership sinks in the sands outside of Mumm-Ra's Black Pyramid. Noting that the Mutants at that point were looking for a place to build Castle Plun-Darr, this suggests that the crew on the ship had perished. It might be because of food rations on the ship had saved the crew while under the sands, but when the ship is raised in episode "The Spaceship Beneath the Sands", the three leader mutants don't make reference to the crew at all, and the crew don't appear in the episode. Episodes; "The Fireballs of Plun-Darr" and "The Trouble with ThunderKittens" both show that the races are now at Castle Plun-Darr. This was never explained.


Unless otherwise noted, the listings will have Slithe, Jackalman, and Monkian; by default. The three races Reptilians, Jackalmen, and Monkians; will simply be referred as "species", since they show up together when utilized in a episode plot.