King of the Arena(1972)

Overview:

One day a sick bear cub was brought to the circus to perform with bears. Professional trainers immediately "rejected" the animal, but saxophonist Kolya, who dreamed of training, took pity on little Gosha and spent years to make him a real circus star of international renown. After many years in the circus, the bear Gosha accidentally finds himself in the forest. Noticing the disappearance, circus attendant Mikheev, together with a local hunter, goes in search of his favorite bear.