Malibu is the clone of Brooklyn.
The plan to create Malibu and the other Clones was orchestrated by Thailog. Demona supported the idea and together they used Doctor Sevarius's skills and the resources of Nightstone Unlimited to implement the plan.
On July 14th, 1996 while Brooklyn was on patrol near the Goldencup Bakery Building, he was bitten by a robotic mosquito that obtained DNA samples from Hudson and then flew back to Nightstone Unlimited Headquarters. There, Sevarius retrieved sample and used it to begin the process of creating Malibu. The cloning process was very similar to Thailog's creation. Sevarius accelerated Malibu's aging until he was at the equivalent maturity of a twenty-something human (or a forty-something gargoyle) and Thailog conducted a subliminal education program instructing Malibu with only very basic speech abilities and one overriding command: "Obey Thailog".  By October, Malibu was released from his cloning tube and soon after was revealed to the Manhattan Clan at Coney Island. With the other Clones he fought against the Clan but was ultimately defeated. With Thailog presumed dead, Malibu and the other Clones seemed lost, but fortunately Talon, who was also present for the battle, offered to take them back to the Labyrinth and have them join his "clan". More than that, he offered to teach them verbs and to think for themselves. The Clones then began to live at the Labyrinth. ("The Reckoning")
Less than a month later, on Halloween 1996, Thailog arrived at the Labyrinth to "reclaim [his] property". Though Talon and Maggie had made some efforts to teach the Clones to have free will, they quickly adjusted to the notion that Thailog was alive and, without signs of reservation, followed his orders and left the Labyrinth with him. ("Masque") From there, Malibu and the others accompanied Thailog to the Eyrie Building where a battle with the Manhattan Clan soon erupted. Malibu followed Thailog's orders and spent most of the battle fighting with Lexington, but in the end, he chose to go with Delilah, Burbank and Hollywood back to the Labyrinth remarking, "Malibu go with Delilah." This statement and other clues (including Delilah and Malibu putting their arms around each other) seem to hint that a romance has begun between the two clones, much to Brooklyn's chagrin. ("Bash")
Malibu looks much like Brooklyn, but the artificial aging changed his coloration, giving him teal skin, red-and-white wings, blackish-green hair, red eyes, black teeth, and a white mouth.  His brow ridges are also more pointy than Brooklyn's. He sounds like Brooklyn when he speaks as well.
1996. July 14. While on a stakeout, Brooklyn is the first to be bitten by a robotic mosquito that samples his DNA. Demona allows herself to be captured by Goliath, Angela, and Brooklyn in order to implement her plan with Thailog. ("The Reckoning")
August 18. Sevarius completes his part in Thailog's project. Thailog begins programming the clones. ("The Reckoning")
October 12. Goliath goes to the Labyrinth to guard the prisoners when Thailog arrives and busts out Demona and Fang. They lure Talon and the Manhattan Clan to a fun house at Coney Island, where the gargoyles first encounter their full-grown clones: Burbank, Malibu, Brentwood, and Hollywood. ("The Reckoning")
October 13. The gargoyles are defeated by their clones and held prisoner. When Demona doesn't allow Thailog to kill Angela, he reveals the clone hybrid he made in secret, Delilah, from the combined DNA of Demona and Elisa. Enraged, Demona releases the clan and Talon and a battle breaks out. The clones and Fang are beaten, and when it appears that Thailog has been killed in a fire, Talon offers to let the clones join his clan in the labyrinth, creating the Labyrinth Clan. ("The Reckoning")
November 1. A fight breaks out between the Manhattan clan and the clones. During the battle, Thailog collects blood samples from the eight members of the clan. Delilah arrives, effectively ending the battle, and she rejects Thailog. Malibu, Hollywood, and Burbank return with her to the Labyrinth, but Brentwood elects to stay with Thailog. Thailog gives the blood samples to Sevarius. ("Bash")
Malibu was named by Demona after the famous "surf and sand" division of Los Angeles as a way to contrast with Brooklyn's name and express, in her opinion, the ridiculousness of Brooklyn's name choice. 
- "The Reckoning" (First Appearance, No Lines)
- "Invitation Only" (No Lines)
- "Reunion" (Indirect Reference Only)
- "The Rock" (No Lines)
Voice Actor: Jeff Bennett
Note: Jeff Bennett did not provide any true lines for Mailbu in the series. However, he did provide Malibu's impact grunt in "The Reckoning" and listing him as the voice actor for this character is consistent with the other cloned characters. He also provided the voice for Malibu in the non-canonical Goliath Chronicles episode "Genesis Undone".