The Cactus King is a giant Kong with a cactus-like object on the back of his head. It is unknown which land he ruled. The Cactus King was in Donkey Kong Jungle Beat after fighting Ninja Kong. Donkey Kong fought him, much differently than the previous battles, as Cactus King was roughly ten times his size. After collecting enough Crests, Donkey Kong traveled through what appeared to be the same level Cactus King lived in. However, when Donkey Kong reached the end of the level, instead of the Cactus King, he found Ghastly King. Ghastly though, looked exactly like the Cactus King having no differences except for a few new moves. It is possible that Cactus King and Ghastly King were even the same person, but this is not confirmed. However, Cactus King is a fake last boss.
At the beginning of the battle, Donkey Kong sees Cactus King on a giant Fire Butapoppo. Once the battle begins, the Hawg begins to breathe out fire. Donkey Kong must clap at the fire until he can approach the Fire Butapoppo. Then, he must clap on the Hawg and stun it. Next, Donkey Kong must jump and start attacking its snout. 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.
Ghastly KingThe Ghastly King is the true final boss of Donkey Kong Jungle Beat. He resembles Cactus King in the game. Ghastly King is fought the same way as Cactus King. Before reaching him, Donkey Kong must go through a similar level, as he went through to fight Cactus King. However, this time, the level is much harder. His attacks are similar to that of Cactus King's, but include several new ones. 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. 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, Donkey Kong receives 800 beats.
- At the very beginning of the Cactus King/Ghastly King's theme song is a remix of the song that played on the title screen of the original Donkey Kong.