Read more about Chemo at: Wikipedia

Official Site: DC Comics

Chemo is a supervillain appearing in comic books published by DC Comics. Debuting in the Silver Age of Comic Books, the character has appeared in both comic book and other DC Comics-related products such as animated television series and trading card.

The character first appeared in Showcase #39 (July–August 1962) and was created by writer Robert Kanigher and artists Ross Andru and Mike Esposito.

Chemo debuted in a story called "The Deathless Doom" in Showcase #39-40 (July–August & September–October 1962), being the adversary for DC Comics' new superteam the Metal Men. The character returned in Metal Men #14 (July 1965); #25 (May 1967) and #46-47 (July & September 1976).

Chemo reappeared in DC Comics Presents #4 (December 1978); Superman #342 (December 1979) and #370 (April 1982); Crisis on Infinite Earths #9-10 (December 1985-January 1986) and Action Comics #590 (July 1987). Writer Len Wein said in a 2006 interview: "I realized after doing that first story [with Chemo] that here was a villain that was a physical match against Superman, so I kept bringing him back".

Chemo has not been a contender in any CBUB matches.