
Dr. Rockzo is the "rock 'n' roll clown"; he does cocaine. Dr. Rockzo admits--often loudly--that not only does he use cocaine, but also huffs paint, uses crystal meth, heroin, pain pills, and OxyContin before finally admitting "I do it all." Dr. Rockzo's real name is Leonard Rockstein, the trouble-making son of a physical therapist who became lead singer of Zazz Blammymatazz, a partying rock band named after the guitarist. They quickly became famous; however, Rockzo insisted on being paid in cocaine. His habit made him increasingly paranoid, and he was eventually fired from the group for violently accusing his bandmates for stealing his banana. After a short-lived solo career, he began his present life as a rock n' roll clown for hire. He was once briefly the star in a reality show, before stealing over 1,000 pounds of cocaine from a police storage facility and going into hiding. One of Dr. Rockzo's talents is constructing elaborate and large balloons in a matter of seconds. He has made a Bootsy Collins Space Bass guitar and a large balloon in the shape of Toki's face. He offers to make one for Nathan outside of a police station, which Nathan declines.
He talks in a high-pitched voice, which every member of the band except Toki finds irritating. He wears a very tight neon jumpsuit with cutouts that expose almost his entire torso and, in the back, the top of his gluteal cleft. The rest of his outfit includes a combination cap, long, thick, brightly-colored hair, KISS-like face paint, furry boots, and a spiky red nose. The colors of his clothing and hair change between episodes, but are always gaudy and fluorescent (except in the episode Snakes n' Barrels II where he steals a woman's black catsuit to use as a jumpsuit). Without the makeup, he is shown to be a balding Caucasian man with long blond hair.
Toki and Dr. Rockzo become friends following Rockzo's first appearance, as Toki has a childhood trust of clowns (he is shown as a child with clown/serial killer John Wayne Gacy). Rockzo is not well received by the other band members, particularly Murderface. Ultimately, Ofdensen throws Rockzo out of Mordhaus and orders a few Klokateers to "put the boots to him, medium style". After this, a more deranged Rockzo is approached by the Tribunal; they hire Dr. Rockzo to gather information about Dethklok from the inside. Rockzo succeeds in taking numerous pictures of Mordhaus, but is forced to flee when Ofdensen catches him opening a safe in the manager's office. Later, in "Cleanzo", Rockzo convinces Toki to take him in, with the other band members deciding to get rid of him by sending him to be rehabilitated by Rikki Kixx.
In Snakes N' Barrels II Leonard Rockstein has been sober for two months and he now does speeches about sobriety in Rikki Kixx's rehabilitation center and dresses like a normal person, as he refers to his "Dr. Rockzo" persona as the source of his drug abuse and had to rid himself of it. He is chosen to host Rikki Kixx's SOBERTOWN USA No Drugs Allowed Sober Rock and Roll Show where in the middle of his opening speech, he starts seeing hallucinations of his former self telling him to do drugs. He freaks out and nervously goes backstage where he sees a confiscated bag full of cocaine next to the corpse of a fan caught trying to smuggle said cocaine into the concert. Rockstein is eventually forced by the hallucinations to take the drugs, relapsing back into Rockzo. After stealing a woman's black catsuit, he bursts onto the stage. His whiteface is actually smeared cocaine, his hair and nose splattered with pot-laced cherry pie and he screams in a dark tone, "I'M B-B-B-B-B-B-BACK, BABY! THE NAME'S DOCTOR ROCKZO, THE ROCK AND ROLL CLOWN, AND I DO COCAINE!".
Rockzo seems to be a parody of various events and persons. According to Brendon Small, Dr. Rockzo was supposed to be an amalgam of every kind of front man from the hard-rock era, from Paul Stanley to Axl Rose and Steven Tyler but the animators made him look like David Lee Roth.[1] During the beginning of the episode "Cleanzo," Dr. Rockzo is seen in his underwear struggling to eat a cheeseburger, a parody of an incident involving David Hasselhoff.[2]
"This music video was banned from Music Television beacause you can see my junk.. through my jumpsuit."