Batman of Zur-En-Arrh first appeared in Batman #113 (February 1958), in the story "Batman—The Superman of Planet-X!". It was written by France Herron and drawn by Dick Sprang.
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In the story, Tlano, the Batman from Zur-En-Arrh, brings Earth's Batman to his planet to help him battle giant robots piloted by an unidentified alien race. While on the planet, Earth's Batman discovers he has "Superman-like" powers through similar means of the Superman of his world. The end of the story leaves it ambiguous to the reader whether Batman's adventure was real or a dream.
One night, Bruce Wayne finds himself in a daze. He dresses as Batman and takes off in the Batplane while remaining unclear of his own actions. Batman soon finds that he has been teleported to another planet called Zur-En-Arrh. There, he meets the scientist Tlano monitoring his activities on Earth and has decided to become a version of Batman for his own planet. On this planet, the Batman of Earth has enhanced abilities due to the different elements of the alien planet. The two Batmen join forces to defeat giant invading robots piloted by an unidentified alien race. After the robots are destroyed, the Batman of Zur-En-Arrh gives Batman (Bruce Wayne) his Bat-Radia device as a keepsake and returns to Earth.
