|The Sewer King|
|Portrayed by:||Michael Pataki|
|Only Appearance:||The Underdwellers|
|Appears in:||1 Episode|
|The Sewer King Gallery|
- "We are the Underdwellers. We are the silent ones. We follow the invisible creed."
- ―The Sewer King[src]
The Sewer King was a minor foe for Batman. He is a staff-carrying, sewer-dwelling villain with an army of runaway children he uses as pick-pocketing minions. His character is a reference to Fagin, the villain in Charles Dickens' Oliver Twist, who ran a similar child thievery racket.
A man shunned by society and stricken with poverty, The Sewer King decided to live in the sewer. His real name unknown, he was quickly able to adapt to sewer life and actually train some select alligators as his pets. He also kidnapped orphans, making them work for him in the cold dark sewer, and struck them with silence and abuse, marking his territory in the sewers with spray-painted signs warning: "Beware The Sewer King".
Batman soon encountered some of Sewer King's orphans, who had been committing petty crimes. He saved one and soon learned that the boy belonged to a gang of forgotten runaways who lived deep within the Gotham sewer system. He also learned that the Sewer King forced the children to steal food and supplies for him. Batman marched upon his underground society and was able to free the orphans, destroy his evil society, and help the orphans find good homes. The Sewer King was taken by the police and the orphans rescued.