The Creature King was one of Space ghost's villains. He used a mind control helmet to control the minds of space animals. He uses his ray gun which fires "nightmare beams" to cause people, individually or en masse, to see huge monsters. His ambition is to rule the galaxy, using his terrifying illusions or his army of space monsters to keep people in line. He is foiled repeatedly by Space Ghost. The Creature King appeared on Space Ghost five times. He was also a member of the Council of Doom.
Batman: The Brave and the Bold
The creature king returned one last time, attempting to build an army to conquer the Ghost Planet and kill Space Ghost. However, Jan and Jace overheard the plans and warned Space Ghost, who enlisted the help of Batman to defeat the Creature King. At the end of the battle, Batman punched out the Creature King, knocking off his mind control helmet, which was crushed by one of his animals. It appears he was then eaten by his creatures.