Dragons can breathe fire, fly and are usually depicted as bigger than bears, so the dragon would win.
a dragon
In an all-out fight (not race) a bear would win. In a race of speed, obviously the cheetah would win.
The atlas bear would win.
I think the polar bear would think he had won the fight at first but, if that komodo dragon got just one bite into that bears flesh somewhere, that bear is going to die. The komodo dragon has some nasty bacteria in their saliva that poisons and rots living tissue.
The black bear would win.
a bear
bear
The black bear would win this fight. A black bear has more muscles and a bad aggression with sharper claws and teeth.
The grizzly bear would probably win
The grizzly bear would still win the fight because it has a larger size and stronger claws and teeth.
The giant black bear would win, but it would be injured.
Paddington