Jungle Taitei - episode 38 - 21 Jun, 1966

While Kimba takes the children at school on a field trip to Volcano Island, Boss Rhino is busy there trying to make way for a female rhino that's about to give birth. Boss Rhino demands that Kimba leaves, but when Kimba refuses, he is forced to accept Boss Rhino's challenge to a match. The two fight, and both end up equally injured. (Source: IMDb)