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Real Identity: Not Applicable
Appearances (Episodes): #SuperWho?
Powers/Skills: Acidic Touch
Voiced By: Not Applicable

During a spat between Superman and Supergirl, Superman punched her into a reactor. Supergirl started mocking him as "Clark" and used freeze breath then heat vision. She inadvertently sliced some pipes with her heat vision and the pieces hit a switch that released toxic waste into dumpster. Chemo, a chemical monster filled with hydrogen fluoride and antimony pentafluoride, manifested and went on a rampage. It stepped out of an alley and roared at people. Outside the Metropolis Library, Lois Lane saw Chemo as the opportunity at getting the Daily Planet internship. She threw a rock at Chemo. Its mass splashed and dissolved everything it touched. Chemo turned around and chased after Lane and Jimmy Olsen. Karen Beecher happened to be at the library reading up on advanced chemistry. Lane called out to Superman for help. He tossed Supergirl across town and stood up to the Chemo, easily dodging its punches while hamming it up to the crowd.

Bumblebee found Supergirl and warned her she had to stop Superman from punching it or the splatter of its hydrogen fluoride and antimony pentafluoride would reduce the city to a smoking hole in the ground since it was 20 quintillion times more corrosive than sulfuric acid and high temperatures break down chemicals down to their elements. Supergirl wasn't following. She translated her warning and told Supergirl to get it away from Superman then blow it up. Supergirl zipped Chemo off to space, just before Superman's uppercut connected, and blew it up with heat vision. Superman got the credit though the other Super Hero Girls knew the truth. Prince was proud of her until Danvers stated the lesson she learned was to bring your own camera.