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Shimmer is a former[4] member of the Cult of the Kobra,[5] a member of Onslaught,[6] and the twin sister of Mammoth.[2]

Physical appearance

Shimmer is a young Caucasian woman with short, red hair and green eyes. The right half of her head is bald and adorned with a black Kobra-tattoo. She uses blue lipstick and wears several earrings.[5]

In 2010, she wore sleek, black pants and a blue top with long, black gloves connected to her shoulders.[5]

By 2016, she took to wearing cargo pants and heavy boots and has a belt with a plain, gray buckle and a holster for a machete. She also wears a black, high-cut, one piece swimsuit. She has a small, black band around her left elbow and black, fingerless gloves.[7]


Early life

Shimmer and her twin brother,[2] Mammoth, joined the Cult of the Kobra in 2009.[4]


Santa Prisca
June 19, 00:43 ECT

When the Kobra-Venom was first produced, Shimmer injected Mammoth, with one ampule of the drug. He was permanently transformed into a super strong monstrosity.[5]

Santa Prisca
July 22, post-20:08 ECT

Kobra kept her by his side, and confidently ordered her to one on one combat with Robin. They were evenly matched, but Robin was forced to retreat. When he went after Kobra for the second time, he easily dispatched Shimmer with bolas.[5]

Star City
September 6, 20:12 PDT

Shimmer lead a team of Kobra cultists to steal a cobra dagger from the Star City World History Museum. Green Arrow and Artemis tried to stop her, but their arrows only took down her henchmen. Artemis's oil arrow did contain microbeads with a tracer, which latched on to Shimmer's clothing. She made it to the escape helicopter and disabled another tracker arrow that Green Arrow had shot.[8]

September 12, 21:57 CDT

Shimmer brought the dagger to Kobra, who planned to use it for a ritual involving his brother, Jason Burr. Shimmer watched as her master prepared a ritual.[8]

September 12, 22:00 CDT

During the ritual, Batman, Flash, Green Arrow and their protégés interfered. Whilst Mammoth and the other cultists engaged them, Shimmer stood by her master to help him with the completion of the ritual. When it was complete, she tried to take on Robin. She failed to realize he was a distraction, and Artemis shot a bola arrow to bind her. She was knocked to the ground and watched as the fight went on. Following Kobra's defeat, she was sent to Belle Reve Penitentiary.[8]

Belle Reve Parish
September 16, post-21:55 CDT

At Belle Reve, she got a job in the laundry room, delivering new uniforms to inmates.[9] These proved important in the planned breakout. She stood by Killer Frost for most of the breakout.[10]

Smokey Mountains
December 30, post-10:48 EST

Shimmer was part of an ambush Riddler planned for the Team. She stood by the strategist, but was easily taken out by Robin with a bola.[11]


February 20, post-00:12 UTC+2

Shimmer was working for Queen Bee with Mammoth, Psimon, Icicle Jr. and Devastation. She helped to round up runaways and strays from all over the world to send to the Partner. Soon after they arrived in their main base of operations, intruders were spotted. After the capture of Batgirl, Psimon sent Shimmer to make preparations for the transport of the abductees. Miss Martian found her, and took her out with a brain blast and read her mind. She stored Shimmer in an empty oil drum.[7]

February 20, post-10:34 UTC+2

Mammoth had taken his sister out of the drum, but she was still unconscious when Queen Bee checked on the damage in person.[7]

As she had tested positive for the Meta-Gene, and partly as punishment for her part in losing the shipment of children, Shimmer was sent to the Reach as part of the replacement shipment.[12]

Atlantic Ocean
March 24, 03:17 EDT

Shimmer was stored in a pod with the abductees and kept aboard the Manta-Sub.[13]

Pacific Ocean
March 30, post-18:28 HAST

Shimmer, still in a pod, was transferred to a Reach ship under the ocean. Along with the abductees, Shimmer was experimented on, and was later freed by the Team. While en route to the Bio-Ship, they encountered Black Beetle. In the ensuing battle, Shimmer fought against her would-be liberators. However, she was defeated by Batgirl.

Still groggy, Shimmer's meta-powers activated, and she inadvertently dissolved a section of the hull. A rush of water slammed into the room, knocking Shimmer unconscious and breaking up the battle between the two Beetles. Black Beetle saved Shimmer from drowning, but was forced to let Jaime Reyes escape.[3]

June 14, 05:19 UTC+2

Shimmer, Mammoth, and Devastation made a show of defending the Bialyan temple base against a joint Team-League incursion. A combination of Batgirl's martial arts and Zatanna's magic sent them all through a hole in the floor created by Shimmer.[14]

June 14, 20:16 UTC+2

At the temple, Queen Bee gave the trio her sympathies for being ordered to throw the fight against the Team, but explained that it was necessary for the Light's plans to proceed on schedule.[14]


Shimmer and her allies continued to work for Queen Bee, now under the name Onslaught.[6]


November 01, 01:44 UTC+3

Onslaught provided security at a meta-human auction and fight club in an abandoned mall. When Devastation found Psimon knocked out, she put the squad on high alert, and sent Mammoth and Shimmer outside to help Icicle Jr. They found themselves facing Superboy and Bio-Ship, and got taken down, allowing Nightwing's team to escape with the meta-humans.[6]

Powers and abilities


Shimmer using her powers.

After being experimented on by the Reach, she discovered that she had acquired powers.

  • Transmutation: By touch, she is able to change the state of elements into gas.[15]


Background information

  • In the comics, Shimmer has the power of transmutation, the ability to transform one element or compound into another.
  • This is her first animated appearance.


  1. Weisman, Greg (2012-11-15). Question #16948. Ask Greg. Retrieved 2017-04-28.
  2. 2.0 2.1 2.2 2.3 Weisman, Greg (2011-09-16). Question #13495. Ask Greg. Retrieved 2011-09-16.
  3. 3.0 3.1 Hopps, Kevin (writer) & Divar, Tim (director) (Originally released on iTunes on October 14, 2012, broadcast on January 5, 2013). "Before the Dawn". Young Justice. Season 2. Episode 10. Cartoon Network.
  4. 4.0 4.1 4.2 Weisman, Greg (2022-03-11). Question #25649. Ask Greg. Retrieved 2022-03-11.
  5. 5.0 5.1 5.2 5.3 5.4 Robinson, Andrew (writer) & Berkeley, Christopher (director) (January 28, 2011). "Drop-Zone". Young Justice. Season 1. Episode 4. Cartoon Network.
  6. 6.0 6.1 6.2 Hopps, Kevin (writer) & Berkeley, Christopher (director) (January 25, 2019). "True Heroes". Young Justice. Season 3. Episode 13. DC Universe.
  7. 7.0 7.1 7.2 Vietti, Brandon (writer) & Murphy, Doug (director) (May 26, 2012). "Beneath". Young Justice. Season 2. Episode 5. Cartoon Network.
  8. 8.0 8.1 8.2 Weisman, Greg, Kevin Hopps (w). Jones, Christopher (a). Atkinson, Zac (col). Sienty, Dezi (let). Chadwick, Jim (ed). "Common Denominators" Young Justice 16 (May 30, 2012), New York, NY: DC Comics
  9. Weisman, Greg (2012-03-23). Question #14531. Ask Greg. Retrieved 2012-03-29.
  10. Weisman, Greg (writer) & Oliva, Jay (director) (September 23, 2011). "Terrors". Young Justice. Season 1. Episode 11. Cartoon Network.
  11. Hopps, Kevin (writer) & Oliva, Jay, Divar, Tim (directors) (April 14, 2012). "Usual Suspects". Young Justice. Season 1. Episode 25. Cartoon Network.
  12. Weisman, Greg (2022-05-23). Question #25959. Ask Greg. Retrieved 2022-05-24.
  13. Weisman, Jon (writer) & Zwyer, Mel (director) (October 6, 2012). "Darkest". Young Justice. Season 2. Episode 9. Cartoon Network.
  14. 14.0 14.1 David, Peter (writer) & Zwyer, Mel (director) (March 2, 2013). "Intervention". Young Justice. Season 2. Episode 18. Cartoon Network.
  15. Weisman, Greg (2019-04-29). Question #22780. Ask Greg. Retrieved 2019-05-02.