The Eraser

The Eraser was the chosen alias of Lenny Fiasco. He wore a costume of a pencil.

History
Lenny Fiasco was a college classmate of Bruce Wayne (Batman), and was continually mocked by his fellow students for all the mistakes he made in class. The few people who remembered Lenny always pictured him with eraser in hand, correcting his mistakes. The only girl Lenny ever wanted was Celia Smith, and he planned to take her to the school's ice carnival. Lenny was crushed when she chose to go with Bruce Wayne. Feeling quite bitter he turned to a life of crime, developing an eraser costume that could eliminate all evidence from a crime scene. He took out advertisements as the Eraser in The Secret Underground, a periodical aimed at Gotham City's small-time criminals. He did a commendable job, and the police were baffled at the lack of clues at a series of bank robberies. They called on Batman, who disguised himself as an organ grinder and hired the Eraser for a mock robbery. Eraser recognized Bruce Wayne through the disguise and revealed that he had became a criminal because Bruce shattered his dreams of going out with Celia. Bruce didn't even remember Celia's name, prompting Eraser into a rage. He knocked Bruce out with sleeping gas, and Bruce awoke at Eraser's headquarters, where the Eraser had constructed a recreation of the college ice carnival. Robin then arrived on the scene and distracted Eraser long enough for Bruce to change into his Batman identity. What followed was academic, Batman beat up Eraser and sent him to jail. In jail Batman presented Eraser with a giant eraser, and advised him to make a new start in life with a clean slate. Eraser didn't seem too amused with Batman's joke.

Powers and Abilities
Eraser wore shoes tipped with pencil-point blades that could also emit a sleeping gas. He wore a mask topped off with a giant eraser that could rub out evidence from crime scenes like footprints, fingerprints, etc.