Batman (1966)

S3E2 Ring Around the Riddler

The Riddler plots to dominate the prize fighting scene in Gotham City by abducting and brainwashing elite fighters with the help of the Siren. Disguised as Mushi Nebuchadnezzar, a fictional boxing champion from Southwest Asia, he dares Batman to a boxing match. However, as the Riddler's intentions to cheat become evident, Batgirl steps in to assist her fellow crimefighters in thwarting his devious scheme.