The outcome of a hypothetical fight between a polar bear and a hippopotamus would depend on the fight's location. On land, a polar bear would likely have the advantage and would likely win the fight. Polar bears are incredibly strong, capable climbers and possess sharp claws and powerful jaws. However, in water, a hippopotamus would have the upper hand. Hippos are excellent swimmers, agile in the water, and have powerful jaws that can inflict serious damage. Therefore, a hippo would likely beat a polar bear in a fight in an aquatic environment. So, the ultimate winner would depend on whether the fight occurs on land or water.