Leonard Rockstein more commonly known as Dr. Rockzo is the rock n' roll clown and he does cocaine. In "Cleanso", Dr. Rockso admits that not only does he use cocaine, but he also huffs paint, and uses crystal meth, heroin, pain pills, and Oxycontin. In his words, "I do it all, baby."
Dr. Rockzo is the trouble-making son of a physical therapist who became lead singer of Zazz Blammymatazz, a partying clown themed glam-rock band named after the guitarist. He took the role of the singer after reading an ad in the newspaper saying that the band was looking for a singer. 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 after he violently accused his fellow band mates of stealing his banana and/or sandwich. 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 with a stutter (probably stemming from his drug abuse), 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 buttcrack. The rest of his outfit includes a combination cap, long, thick, brightly-colored hair, KISS-like face paint, furry boots, and a spiky red rubber nose. The colors of his clothing and hair change between episodes, but are always gaudy and fluorescent. 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. Rockzo is not well received by the other band members, particularly Murderface. This is due to the fact that Rockzo was Murderface's party clown at his birthday and when the clown gave him a balloon guitar, Murderface shoved the balloon down Rockzo's throat. Murderface also hates him for another reason: he woke up and screamed at the sight of Rockzo's hand in his pocket, putting the Murderface's key to his birthday car back in its place; Rockzo and Toki stole Murderface's birthday car and took it on a joy ride. 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. Rockso 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 "Cleanso", 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, referring 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 and cherry pie filled with pot, eventually forced by the hallucinations to take the drugs, relapsing back into Rockzo. After stealing a woman's black tight jumpsuit, he bursts onto the stage in slapdash clown makeup and hair, covered in cocaine and cherry pie sauce and screams in a dark tone, "I'M B-B-B-B-B-B-B-B-BACK, BABY! MY NAME'S DOCTOR ROCKZO, THE ROCK AND ROLL CLOWN, AND I DO COCAINE!" Coinciding with other intense moments in the episode (such as Toki beating a man to death, and the members of Snakes 'n' Barrels suffering from severe aftereffects of Totally Awesome Sweet Alabama Liquid Snake), this was quite a climactic moment.
He is in the first Metalocalypse Christmas episode, Dethmas. At the beginning of the episode, it is revealed that Rockzo had been arrested for stealing Christmas presents to sell so he could buy cocaine. Toki reveals that he has cutoff all connection to Rockzo. Rockzo is let out of jail on parole & gets a job as a department store Santa. Toki is at the mall to meet Santa Claus, only to meet up with Rockzo and brings him back to Mordhaus with him. Rockzo tries to get Toki to get him some cocaine, but Toki refuses, causing Rockzo to violently push Toki's head into the bathwater—stopping short of drowning him. Left alone at Mordhaus while Dethklok goes shopping with their moms, Rockzo steals Toki's secret Santa presents and pawns them for money to buy cocaine. Rockzo later crashes Knubbler and Murderface's Christmas special, where he receives a hand job from a drunk Serveta Skwigelf. Toki discovers his presents gone and confronts the clown, threatening to kill him; however, a wooden cross falls on Toki, pinning his legs under it. The episode ends with Rockzo stating "Good Christmas Party".
He made his next appearance in the Season 3 episode Anusblaster, where he attempts to have a reunion with his former band Zazz Blammymatazz. It wasn't the first time they tried to have reunion. Dr. Rockzo ruined three reunions because of his drug use(at one time he refused to pay off the cartel, causing him to be shot in the side of his penis). It was revealed that the band mainly split up because Dr. Rockzo was in a relationship with a fourteen year old girl named Dory Mclean. The band finally had the reunion and was a success(even Nathan said that Dr. Rockso was "fucking amazing"). However, an electric fire ruined their reunion, which shocks Dr. Rockzo. Dethklok then reunites Rockzo with Dory, who is now middle aged and unattractive to Rockzo. But Dory now had a teenage daughter whom Rockzo instantly became interested in.
According to Brendon Small, Dr. Rockzo was supposed to be an amalgam of every kind of front man from the hard-rock era, including Paul Stanley, Axl Rose, and Bret Michaels. Eventually the animators made him resemble David Lee Roth. 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. Dr. Rockzo has also been said to be a parody of Van Halen front man David Lee Roth (it is later stated in this article that he is a parody of Eddie Van Halen himself, but Roth fits the bill more accurately based on his behavior.)
A common running gag in the series is to have Rockzo repeatedly beaten up by Klokateers. This happens in "Birthdayface" after he attempts to give Murderface a balloon guitar, and in "Dethclown", when he gets kicked out of Mordhaus for taking a joy ride on the Dethcycle with Toki.
Known Dr. Rockzo songs Edit
Dr. Rockzo's signature song is most likely "I'm Just a Rock 'n Roll Clown", which appears in two episodes. It describes Dr. Rockzo and his drug abuse. Later, when Rockzo becomes sober, he is shown performing a song called "Goodbye Snowy Road", a soft power ballad about him leaving his life of drugs, referring the "snowy road" referring to his drug use. It is revealed that Rockso is able to play piano. "Atomic Clown" and "Dory McLean" appear in the episode "Dethzazz"
- Dr. Rockzo owns a Mauser C96 Shanxi Type 17
- Although Dethklok seems to stand for the Death Metal part of Heavy Metal, Rockzo seems to be based more on the glam metal/hard rock part of Heavy Metal, what with his glamorous look and how all of his songs and themes are musically similar to Hair bands like Aerosmith, Van Halen, Motley Crue, Quiet Riot, etc. This is a bit ironic, given the fact that the Death Metal and Glam Metal/Hard Rock sections of Heavy Metal are quite different in terms of distortion and intensity/violence yet Dethklok and Rockzo are constantly mingling.
- There is some uncertainty of how Dr. Rockzo's name is spelled. Adult Swim has officially spelled his name "Rockzo", however his name has been spelled "Rockso" in the series.
- A big part of Dr. Rockzo's clothing, mainly his headgear and spiked braclets, was added to the Game "Team Fortress 2" under the following names: "Dethkapp", "Nose Candy" and "Rail Spikes".
- The Def Leppard song "Photograph" contains the phrase "rock 'n roll clown" and could be the inspriation for Dr. Rockzo's character.