Professor Calamitous

""Hello, Jimmy! Please allow me to introduce myself. I'm... uhmm, err...""

- Professor Calamitous

Professor Finbarr Calamitous is the main antagonist of The Adventures of Jimmy Neutron: Boy Genius animated series. He was a former student of Retroville Elementary, famous for never finishing anything he did, such as inventions, his lunch, and even his own lines. He was voiced by Tim Curry.

Role in the series
In his first appearance, Calamitous plotted to destroy Jimmy Neutron out of jealousy of his geniu, but failed when Jimmy took advantage of his habit of never finishing anything to force him into retreating. After that incident, Calamitous took shock therapy to cure his speech problems, but even that didn't last long. He kept appearing in the series trying to destroy Jimmy and his friends, even joining forces with his other enemies, but failing every time.

Nicktoons Unite!
Calamitous is the one who formed the Evil Syndicate to steal energy from other worlds to power his Doomsday Device, a machine made to destroy worlds in seconds. He kept instructing the other villains to attack the heroes while he acted behind the scenes to perfect the machine. In the final battle, he ordered the villains to retreat and attack the heroes all at once. But even that failed, as Calamitous was defeated by Jimmy after the other villains were defeated, right before Spongebob turned off the machine.