Source unknown, artwork found at: http://chibiland.dearchibi.com/chibiothers.html
Thanks to @kunzoi-archive for helping me find these! I knew the Shitennou chibis existed, but that site has many more season 1 characters:
My main desktop computer is broken, and I'm having trouble getting Blender to work on my laptop, so it may be a bit longer before I get more artwork done. I am still working on my story, and working on writing notes, so hopefully I can still get something done! In the meanwhile I wanted to share these here.
If anyone knows the original source for these let us know!!