Most celebrities were not voiced by their real-life selves, but by veteran voice actors. However, Mills Lane provided his own voice as the referee and later replaced by another voice actor when the series was briefly revived. Mills gave his blessing because of a stroke he suffered.
Most of the episodes were just about the fighters and their matches, however one short-lived story arc revolved around the mustachioed announcer Nick Diamond. He was injured when the announcer's tower collapsed (after Roger Ebert was flung into it during a match) and he was hospitalized. In the episodes that followed, he was shown in the hospital, and one of the matches featured was a "dream match" of his with Elvis fighting Jerry Garcia. The "Nick Diamond getting injured" character arc was one of, if not the only, character arc on the show.