Fights between animals is huge in asia. You've got cocks, jay thrushes, praying mantises, crickets...
My dad told me when he was a little kid, he used to sneak out to the cemetary at night with his brothers to catch crickets. They would then yank a hair out of the cat and fashion a cricket leash out of it. And yes, they would use the crickets for fighting.
1.0 Pastel Ball Python, 1.9 Normal Ball Pythons, 0.1 African House Snake, 1.0 Savannah Monitor, 0.0.1 Argentinian Horned Frog