Thundarr The Barbarian was an animated show that ran for two seasons from 1980-1982 and then again in reruns in 1983. The show was set in the post-apocalyptic future, which featured regions throughout the United States. The new world is filled with various kingdoms, many ran by wizards and warlords. The characters consisted of the hero, Thundarr, a sorceress named Princess Ariel, and Ookla the Mok, a strong beast-like creature. Thundarr carried a powerful weapon called Sunsword. Altogether there were 21 30 minute episodes of Thundarr made.
You can buy it on DVD at Amazon right here.