He is a talented explosives expert. Two-Face commissions him to help with a terrorist attack for ransom, but Abner sabotages the device so the bomb will blow up prematurely and kill him. Batman is able to rescue Two-Face and the bomb explodes inside of a helicopter thousands of feet in the air. Bartholomew Wolper declares that the Joker has recovered from his insanity and releases him from Arkham Asylum, going on to do a talk show guest appearance. Abner uses a flying device in the shape of a small child to release "Joker toxin" as a gas to murder an entire studio audience while Joker escapes police custody. They visit a carnival where he assists the Joker in massive slaughter until they are broken up by Batman and Robin. Robin fights Abner on a roller coaster, and he manages to start choking her until he is decapitated by the ride.
- 5 Appearances of Abner (Earth-31)
- 3 Images featuring Abner (Earth-31)
- Quotations by or about Abner (Earth-31)
- Character Gallery: Abner (Earth-31)