Before reaching him, Donkey Kong must go through a wooded hollow. Once he enters the King's lair, Donkey Kong sees Cactus King on a Final Butapoppo. Once the battle begins, the Hawg begins to breathe out fire. Donkey Kong must clap at the fire until he can approach the Final Butapoppo and stun it, allowing him to attack it. Once Donkey Kong has landed enough blows on the Hawg, Cactus King will jump and crush the Hawg. Donkey Kong must fight Cactus King by wall jumping at him, swinging his legs, or knocking him forward. If he is knocked down, the player can pound on him. During the second fight however, the level is much harder. The new attacks include the ability to spit balls of energy out of his mouth at Donkey Kong, as well as being able to kick him in midair. However, the balls can be destroyed by using the Sound Wave Attack.
Like the other bosses, Ghastly King has 500 HP in both fights. He can be attacked by either encountering him face to face, or by throwing him into the walls, which momentarily knocks him out and allows the player to punch him. If the player attacks him face to face, Ghastly King attacks Donkey Kong with a backhand slap, throwing him into the wall. If Ghastly is attacked enough times, he flies into the wall and is momentarily knocked out.
When Ghastly King is defeated both times, Donkey Kong receives 800 beats.
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