there are many hybrids out there. probably the most popular are the jungle corn, and the creamsicle corn...
the jungle is a corn snake x cal. king and the creamsicle is a corn x emory. i do know some people make creamsicles without the emory blood for a "pure" creamsicle but it is hard to find them as bright or brilliant looking in my limited experience.
on kathy love's site corn-utopia in her picture gallery there are some pictures of corns crossed with milks, gophers, and kings if you'd like to see some crosses. enjoy!!! ---jim
p.s. i believe the original bubblegum rats were produced from yellow rats, black rats, and corns but am unsure of the exact mix so don't quote me on this...