Knockout is a supervillain in the DC Comics universe. She first appeared in Superboy (vol. 4) #1 (February 1994), and was created by Karl Kesel and Tom Grummett.[1] A former Female Fury warrior from the hellish planet Apokolips like Big Barda, Knockout also escaped to Earth. Though while Barda became a superheroine, Knockout became a supervillainess. She later joined the Secret Six team, which committed actions more as antiheroes.