Sigmund Brock[1][2] is a character from the television show American Dragon: Jake Long. He is voiced by Corey Burton.[3][4]
History[]
Professor Rotwood's mentor, a researcher of the magical world, and inventor of Brockium - a chemical that will make any disguised dragon revert to its true form - he was a professor at Fumshteiken University when Rotwood was a student there. Brock is brought in to replace Rotwood as Principal of Fillmore Middle School when Jake gets Rotwood fired in The Rotwood Files.
However, because he has Brockium and is determined to catch the dragon at Jake's school, Jake has to get him fired as well. He even resorts to forming an alliance with Rotwood to do so. In the end, Brock is fired & arrested, Brock vowed to reveal magical Creatures to Humanity, get revenge on Jake, vow to return, get near Trixie & Spud who kept Jake's Secret, and Rotwood is restored to his position as principal.