On Earth-Six, the United States lost the Revolutionary War. Lord Volt and his wife Lady Quark ruled America as a superpowered monarchy. During the Crisis on Infinite Earths, Lord Volt tried in vain to save his daughter Princess Fern from the antimatter wave and was killed. Earth-Six was subsequently destroyed and only Lady Quark was the reality's sole survivor.
- 8 Appearances of Karak (Earth-Six)
- 2 Images featuring Karak (Earth-Six)
- Quotations by or about Karak (Earth-Six)
- Character Gallery: Karak (Earth-Six)