Myzax, also known as the Galactic Gladiator, is an alien who remained undefeated in the Galra Empire's arena until Shiro fought him for Zarkon's entertainment during Shiro's year as a Galra prisoner. Initially, Matthew Holt was intended to fight Myzax, but Shiro faked a bloodthirsty desire for battle and attacked Matt, minorly injuring him so the Galra would have Shiro fight instead, and thus saving Matt's life. Shiro was able to discover Myzax's attack pattern and ended up victorious, earning the title of Champion. Xi witnessed these events.

After Shiro becomes the Black Paladin with the return of Voltron, Haggar uses her dark magic and Galra technology to turn Myzax into a Robeast fueled by revenge.

Weapons & Abilites


Before the becoming a Robeast, Myzax was a skilled gladiator and remained undefeated until his fight against Shiro. He wielded a wand with a purple energy ball that could be thrown and called back. However, Myzax's weakness was that the energy ball needed to be recharged after three throws.


As the Galactic Gladiator Robeast, Myzax retains all of his combative abilities including his signature wand, but on a much larger scale. Thanks to the size and power increase of the wand, the energy ball is much more destructive, capable of even damaging Voltron. However, much like his original form, the Galactic Gladiator's energy ball has to be recharged after three throws.