These are characters from Sparks Nevada, Marshal on Mars.
Note that characters that appear in a Spin-Off such as Tales of the United Solar System Alliance, but not in a Sparks Nevada, Marshal on Mars episode can only be found in that segment's character category.
- Cactoid Jim, King of the Martian Frontier Characters
- Tales of the Troubleshooter Characters
- Tales of the United Solar System Alliance Characters
- The Red Plains Rider Characters
- War of Two Worlds Characters