|King Goobot V|
|Family||Ooblar, the Yokians, Poultra|
|Friends||Finbarr Calamitous, Beautiful Gorgeous, the Junkman, Eustace Strych, Grandma Taters, Baby Eddie, Ooblar, the Yokians, Poultra, and other villains|
|Enemies||Jimmy Neutron, Carl Wheezer, Goddard, Cindy Vortex, Libby Folfax, Nick Dean|
|Likes||Evil, power, putting Jimmy in danger, killing and brainwashing people, organizing villain groups, other villains|
|Dislikes|| Jimmy Neutron
|Voice Actor|| Patrick Stewart (in the film)|
S. Scott Bullock (in the TV series)
King Goobot V is the main antagonist of Jimmy Neutron: Boy Genius and a minor antagonist in The Adventures of Jimmy Neutron: Boy Genius. He is Jimmy's arch-nemesis, Ooblar's older brother, leader, and boss, and the supreme ruler of the Yokians.
After seeing Jimmy's message from Earth, he captured all the adults so they'd be fed to their evil chicken god, Poultra. When Jimmy and his friends arrived on Yokus, he threw them into a prison, so they'd be imprisoned until they were adults to be Poultra's next human sacrifice, which makes him a sadist as well. Luckily, Jimmy stopped his evil plan and saved all of the adults.
Goobot and his minons returned in The Eggpire Strikes Back, where he and the Yolkians pretend to have changed due to Poultra's death. Goobot's plan was to have Jimmy's friends and family lost their trust in them and then have Jimmy watch Poultra devour everyone he cared about.
Finally, he appears in The League of Villains where he gathers several of Jimmy's enemies to finally kill him. With the help of his friends and the reformed Space Bandits, he and his minons were trapped in prehistory forever. It is unknown what happened to Goobot and the villains after that, but they were probably killed by the dinosaurs.
- Goobot is similar to Lex Luthor from the Superman comics.
- He is also similar to Dr. Eggman from the Sonic the Hedgehog franchise, much to that of his personality.
- Goobot is also the main antagonist of Jimmy Neutron's Nicktoon Blast.
- Originally, Goobot was designed as a tall, slim alien and not wearing a golden unicorn. Instead, he wore a grey metal suit, as well as a different-colored crown.
- It is possible that Goobot is still in prehistory (along with the other villains) due to Jimmy's opinion, which is that Goobot is "millions of years ahead of everyone".
- He was mentioned in "Win, Lose and Kaboom" when Cindy was warning Jimmy about the possible dangers of answering the space rock.
- Goobot made a cameo appearance in the beginning of "Jimmy Timmy Power Hour 3: The Jerkinators" when Jimmy was looking at what everyone was doing. Of course, this is non-canon with the franchise.