Lenny Fiasco was a low-grade student during his high school years, during which he was schoolmate of Bruce Wayne. Eventually, Fiasco dropped out of school and pursued a criminal career as the masked criminal known as the Eraser.
Fiasco adopted the name of Eraser as a reminder of his constant failures during his school life and also because he provided a special service to the criminals of Gotham City. Fiasco would be hired by thugs to eliminate every trace of evidence left at the crime scenes, making it impossible for the Police to find any clues. The Eraser even managed to stymie Batman and Robin, the greatest detectives in town. However, the Eraser was eventually captured by the Dynamic Duo, after they managed to infiltrate in his hideout.
The Eraser wore a costume that made him adopt the appearance of an actual pencil.
- Eraser Helmet: A protective head gear that not only concealed his identity, but also deleted traces of footprints, fingerprints and any other evidence from crime scenes. It was shaped after a pencil eraser.
- Sharp Point Shoes: Shoes that could harm opponents due to their sharp point and also concealed knockout gas. These were shaped after a pencil tip.
- Yellow Suit with black stripes
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- The Eraser has made minor appearances in Post-Crisis continuity. He popped up in Ambush Bug: Year None #4 and soon after in Batman #682.
- 6 Appearances of Leonard Fiasco (New Earth)
- 1 Images featuring Leonard Fiasco (New Earth)
- 1 Quotations by or about Leonard Fiasco (New Earth)
- Character Gallery: Leonard Fiasco (New Earth)