Everyone in Earth-Eight: Caped Crusaders

The Dynamic Duo were their worlds' first fully functional costumed partnership, matching analytical abilities with physical attributes, equal parts brave and bold mixed together.

And yet, Batman and Robin were not the only father-son team to take on those who would violate their personal principles. While not as legendary, the team of Der Grösshorn Eule and Fledermaus, the team espoused the ideology of their corrupt government and attempted to corrupt western society as well alongside Axis Amerika.

Equipped with various devices, skilled in various acrobatic techniques, and possessed of their own brand of mental aptitudes, Horned Owl and his sidekick nevertheless had a short-lived relationship as the psychotic lad lost his life. Well, that was on the merged world, perhaps on Earth-Eight he continued operating alongside his father for quite some time during the decades of Nazi rulership on that globe.

Studying these pair of pairs one thing becomes evident... what measures a hero isn't their conviction for a cause but their continual sight toward what is right... which neither Der Grösshorn Eule and Fledermaus possessed during their lunatic lives.

How, though, can we say with certainty that this hero originated on Earth-Eight? Well, writer Roy Thomas mentioned how the Young All-Stars absorbed the energy left over by heroes that ceased to exist during the 1940's, including the golden age Batman and Robin. It was revealed during the Infinite Crisis by Alex Luthor of Earth-Three that the potential Earth-Eight was where all remaining characters originated that had not previously appeared on former Earths known as Earth-One, Two, Four, S or X. Their adventures on that merged post-Crisis Earth would have mirrored those on Earth-Eight.