The black bear would possibly win because it would bite the ox's face.

The large ox. It would gore the black bear with its horns.

it's a large white bear with a black nose

Panda it's a large white and black bear. It is endangered and feeds on Bamboo

The polar bear is much stronger than any black bear. Even a very large male black bear would be no match for a female polar bear.

its fairly large but not really big with not to pointy of a nose and its black so all in all it looks like a bear that happens to be black