King Goobot V, better known simply as King Goobot or Goobot, is the main antagonist of Nickelodeon's sixth feature film Jimmy Neutron: Boy Genius, and a major antagonist in the TV show The Adventures of Jimmy Neutron: Boy Genius. He is the King of Yolkus and the employer of the Yokian Fleet Commander, who serves as Jimmy's second archenemy (after Professor Calamitous).
In the movie, he was voiced by Sir Patrick Stewart. In the TV show, he was voiced by S. Scott Bullock.