Crocker is shown watching children's show and tells. When Timmy brings an actual dinosaur for show and tell, Crocker realizes that Timmy must have gotten it from fairies. Crocker then asks for a parent teacher conference, but Timmy quickly has his godparents pose as his parents. Crocker tries to expose them, but fails each time due to dumb luck. When he finds Chester and A.J. looking for the dinosaur, he promises they can enslave the Earth if he gets the dinosaur. However when he gets the dinosaur Timmy quickly uses a wish to replace the dinosaur with Mange. Crocker is then punished by Waxelplax due to him trapping her in a toilet paper cocoon. Crocker swears to Timmy that he will get Timmy's godparents and that they can't keep him here forever. He speaks too soon as Waxelplax then falls into one of Crocker's earlier failed traps, much to Timmy's delight.
On the last day of school, Crocker correctly suspects that Timmy has turned himself invisible using fairies, and using a Heat-Seeking Fairy Suit, tries to hunt down invisible Timmy and his fairies. Crocker's invention works and allows him to see Timmy, but Wanda beats him up and Timmy is wished back to normal before Crocker can grab him and prove he was invisible to the school.
Timmy wishes himself into the Internet and ends up in Crocker's computer. While spying on Crocker undergoing a humiliating dress-fitting ritual with his elderly mother, Timmy makes an audible noise in Crocker's computer, getting his attention. Crocker suspects Timmy is a computer virus and sends several after Timmy, and another to spy on Timmy's computer. Crocker's virus successfully collects video data of Cosmo and Wanda carelessly using magic, but Timmy intercepts and destroys the data before it can be uploaded using Crocker's other viruses. Timmy then uploads the Crocker dress fitting footage he captured earlier to the entire world, humiliating Crocker, who is also arrested when A.J. and the government trace the viruses back to him.
In the first TV movie of the Series, Denzel Crocker steals Timmy's magic muffin and makes Dimmsdale into Slavesdale. He becomes an authoritarian leader in this new world order he's made and captures Wanda. After escaping Crocker at Dimmsdale Elementary, Timmy fights Crocker in the wasteland of Slavesdale. When Turner is on the ropes, Cosmo takes his place but is soon overpowered by Crocker. Crocker next battles Timmy in extra-dimensional space, then ancient Egypt, and on a subatomic scale. After Timmy frees Cosmo and Wanda from Crocker's scepter, Crocker threatens to harm Timmy's parents. Pursuing him to the Turner house, Timmy admits he has fairy godparents and Crocker is defeated.
Although Crocker himself does not appear in this episode, Alden Bitteroot is the central villain and has all of Crocker's looks and mannerisms, with the exception that Bitteroot is obsessed with witches as opposed to fairies. In actuality, Bitteroot himself was a witch. It is unknown if Bitteroot is an ancestor of Crocker.
Crocker senses that Timmy can read minds, assumes his fairy godparents are responsible, and creates a metal dome-shaped helmet that deflects Timmy's ability. Crocker nearly breaks Timmy into admitting his fairy godparents with the dome.
Crocker appears at the beginning of the special to assign Timmy and the other students their summer reading. After mocking his students, Crocker dons summer garb and drives off on the ground in a jet-ski. At the end of the special, Crocker fails all the other students due to changes that Timmy's adventure had on the books that they had written about, while Timmy manages to get a rare A on his report, much to Crocker's dismay.
Crocker like Chet Ubetcha declares that he will run a marathon after Timmy's wish gives him an extreme sweet tooth. Whether he did is debatable as he along with everyone save Mark Chang later appear rotundly obese. In such shape, Crocker illustrates the peril Earth will soon befall given the towering obesity rate caused by Timmy's über-dessert wish.
Appears as a patient with a broken back. After Cosmo cures him of his malady, Denzel Crocker leaps over a candlestick and out a window where individual and injury reunite. More to the point, he broke his back again.
Crocker as an unintentional antagonist, when he releases his spiders, Donnie and Marie to hunt around his room. Normally, this would not be dangerous, unless Timmy was the "Fly Boy" and had buzzed onto Donnie and Marie's turf.
Denzel Crocker suspects Timmy's Dad is a fairy after the latter pulls off a good magic act and breaks his mediocre record at being a magician. He nearly succeeds until Timmy wishes Crocker into a fairy. At first embarrassed and later elated, Crocker takes flight through the moonlit heavens only to come falling down after Timmy wishes for him to be normal again.
In one of his funniest episodes, Denzel Crocker comes across a guinea pig, (unaware that Timmy wished to be a teacher's pet and Poof granted his wish literally). Crocker tests a gene splicer on Timmy to determine if it was worth the effort to make a device to become a fairy-catching monster. Timmy lives, and Crocker assumes the hot seat and becomes a Persian Bumble Chipidillo Hound. Crocker's reasoning was to have the nose of a bloodhound, the wings of a bumblebee, the armor of an armadillo, and the cheeks of a chipmunk to respectively sniff out, fly after, shield him, and store fairies for the purpose of draining their magic into him (he wanted the hair of a Persian cat to be a "real chick magnet"). He captures seven fairies as the goofy form he made but Timmy reverts Crocker back into a human and the fairies and test animals are set loose on the teacher. Crocker survives to plot another day naturally.
Crocker first makes a cameo in the first half in the footage of Timmy's wish of everyone having a stinger, where he is eager to sting his mother with his new stinger.
In the second half, after Timmy's secret wish of magically stopping time to keep Cosmo, Wanda, and Poof forever is revealed, resulting in him losing his godparents and his memory of them, all his wishes (including Poof) being undone, and everyone in the world aging by 50 years, he runs into Crocker on the park bench, whose appearance hasn't changed due to the trauma of losing his fairies; when he mentions this, Timmy, who had his memory of his godparents erased, has it jumpstarted by this. Crocker agrees to help Timmy enter Fairy World in exchange for prunes and a bran muffin. Once there, they, along with Cosmo, Wanda, and Jorgen, venture into the Hocus Poconos to rescue Poof, Foop, Dark Laser, and the Crimson Chin; there, he almost gets eaten by Chuckles the Fairy Eating Cockatiel, but Poof saves him. When Timmy is left behind in the Hocus Poconos while distracting Chuckles to save the others, Crocker mentions that he'll miss him, saying that stalking him and giving him F's gave him purpose in life. After Timmy manages to convince the Fairy Council he isn't the worst fairy godkid ever by explaining the reason behind his secret wish and has everything undone, he specifically thanks Crocker for helping him get his fairies back and undo the damage of his secret wish.
A running gag throughout the final quarter of the episode is Crocker believing the gang is in New Jersey, and trying to figure out which New Jerseyan city they're in.