How do you beat the dragon boss in ninja gaiden dragon sword for the ds with momiji in hard mode?

To beat the dragon boss in Ninja Gaiden: Dragon SWord with Momiji on hard mode, focus on evading its attacks while maintaining a safe distance. Use your ninjutsu effectively, especially the Wind or Fire ninjutsu, to deal significant damage. Pay attention to the dragon's patterns and strike when it is vulnerable, typically after it performs a major attack. Additionally, utilize your quick dash and jump abilities to avoid incoming projectiles and stay mobile throughout the fight.