Brown the bison in a large pot over medium-high heat.
Add the chopped onions and peppers, and cook until tender.
Add the drained sweet corn, kidney beans in tomato sauce, and diced tomatoes. Stir well.
Toss in the minced garlic, cocoa powder, chili powder, cumin, and paprika. Season with salt and pepper to your desired taste.
Let the chili simmer over medium heat, covered, for 25 minutes, stirring occasionally.
Pour in the apple cider vinegar and brown sugar. Continue simmering over medium-low heat for an additional 25-30 minutes, or until the sauce has thickened to your desired consistency.
Serve the bison chili right away with fresh cornbread. The flavors develop overnight for incredible leftoveres. Enjoy!