Who is the final boss in Arcade mode? How do I beat him?
The final boss is Onaga, the Dragon King. His attacks are limited to projectiles and grabs. He is also invulnerable to most grabbing and freezing projectiles. It is best to use style branching combos to defeat him. Also, if you touch one of the Kamigodus encircling the temple, Onaga goes to his knees allowing for a free hit.