Mr. Denzel Quincy Crocker is one of the two main antagonists of the Nickelodeon cartoon series The Fairly OddParents. He is Timmy Turner's arch-nemesis. In the first five seasons, he was the secondary antagonist, but he became the main antagonist in the recent seasons as the show’s progresses.
Denzel Crocker worked at a number of different schools and colleges before ending up in Dimmsdale Elementary School. He was once an aspiring professor for Dimmsdale University, but his proclamation of his belief in fairies led to him becoming a laughingstock in all the city of Dimmsdale. He was also kicked out of a New Baltimore Community College for spending money on fairy tracking inventions. Even after landing a job in Dimmsdale Elementary, he was still scorned and laughed at by his colleagues, including Principal Waxelplax.
In Crocker's past life, he was an adorable and kind child who enjoyed helping others. His mother was never around very often and thus he got babysat by a mean babysitter named Vick. Because of this, he was very miserable. However, his sadness ended after having received his own Fairy Godparents, Cosmo and Wanda.
Unfortunately, after Timmy time travels to the year 1972, Timmy and Cosmo accidentally reveal Crocker's secret about his fairies in front of the whole town who had gathered to celebrate a day honoring Crocker. Because of this, Jorgen Von Strangle is forced to erase Crocker's memory of him ever having fairies, and because of an overdose from the memory wiper, Crocker becomes horribly disfigured, and the town's people, who had now completely forgotten all the nice things that Crocker did with his fairies, assumes that they must be an angry mob and chase him down. He remembers nothing but he finds a DNA tracker device that Timmy left behind in the past on which he wrote 'Fairy Godparents exist' on the back before his mind was wiped. Crocker uses it to try and find real fairies. Timmy later wanted to return back to March 14, 1972, but he was stopped by two Jorgen Von Strangles. After that, the event ends with Jorgen and his other self dancing on the dance floor 1970's style.
Crocker's life of a teacher is comical in the way that Timmy's principal, Geraldine Waxaplax, beats him up for actions such as going into the girl's bathroom. He had to switch jobs three times, changing into a ham salesman, a tour guide in the episode "Nega Timmy", and a crossing guard in the episode "No Substitute for Crazy!".
And he is reprised by Carlos Alazraqui in the English dub and Hiroshi Iwasaki in the Japanese dub. (But in some point in time that someone could voice him in Japanese, if it is a tribute.)