Ultraman Taro: S1 E34 - The Last Day Of The 6 Ultra Brothers! Ultraman Taro

After defeating Alien Temperor on his own, Ultraman Taro becomes overconfident and won't even listen to the other Ultra Brothers' warnings. However, the alien that Ultraman Taro defeated was only a double. While Kotaro counters the attacks from the alien again in his grandstand play, his brothers decide to wait until Kotaro realizes his own mistake.