Dragonlord

The Dragonlord is a large dragon in the Dragon Quest series

Strategy
During the boss battle, the Dragonlord will start to attack the Hero. He should keep attacking him until the boss is dead.

Other media
The Dragonlord in Captain N appeared as a minor villain in the series. He is red, instead of blue and appeared in Three Men and a Dragon and has warned by Simon to be defeated.