Rokk and Sorban, Nugat and Karmeel. Alien brothers who came to Earths One and Two respectively to torment Superman, the Flash and a dark knight. While Rokk and Sorban first encountered Superman and then the World's Finest team of Batman, then tried to unnerve the man of steel once more tricking him with duplicates of his Kryptonian parents. All to satisfy gambling urges. Later, Abra Kadabra and Reverse Flash teamed up to assume the pairs identities and initiate a second race between Flash and Supes.
Nugat and Karmeel were brothers sent along with their fellow aliens sent by Creator2 to remove Earth-Two's Justice Society so that they could remove the planet from existence for a contracted intergalactic project of an unspecified nature. Defeating first Superman then Doctor Mid-Nite and the Flash, eventually almost all of the JSA were beaten by the alien horde. The effects of the alien nets which captured the trio were felt by Earth-One's Superman, Flash and... Batman? The text states Doc Mid-Nite's "closest" counterpart was Batman. However, since a comatose Doctor Destiny had invaded the mind of the caped crusaders previously, evidently Destiny based on the ill-effects of Mid-Nite's capture to Batman. However, ultimately thanks to the intervention of the Spectre the space-vessel of Creator2 and his minions was destroyed and Earth saved.