Marx

Marx is the final boss of Milky Way Wishes in Kirby Super Star. He originally appeared as a small jester who asks Kirby into helping him end a quarrel between the sun and moon. When Kirby listens to his plea and does as he says, he turns up and reveals that he manipulated Kirby to gain power. Upon gaining power, Marx becomes a bat-like entitly. After Kirby defeats Marx he flies away and crashes into Nova. Marx was believed to be destroyed in the crash, but he turns up much later in the True Arena in a zombified form known as Marx Soul.

Kirby Super Star and Kirby Super Star Ultra
Marx makes his first appearance in the sub-game Milky Way wishes in the game Kirby Super Star. When the sun and moon start fighting with each other, a small jester-like person named Marx tells Kirby that the only way to stop the fight between the two is to gather the stars from nearby planets and use them to summon NOVA, a planet-sized machine that can grant wishes.

After gathering the stars and summoning NOVA, Kirby was then knocked away by Marx, who then made his own wish: to dominate Pop Star. When this happened, he transformed into a fearsome monster and gained new abilities. It turns out that he actually tricked the sun and moon to fight each other, and used them to initiate his plan to take over the planet. Afterward, NOVA began looming towards Pop Star, leaving Kirby alone in space. The stars Kirby gathered, however, create a spacecraft for him to chase after them with. NOVA was suddenly stopped by the sun and moon, giving Kirby the chance to enter NOVA. After Kirby destroys it's core, NOVA is wounded, infuriating Marx who proceeds to attack Kirby. Kirby won, however, sending Marx flying away and into the remains of NOVA, seemingly destroying them both in the process. It was later revealed however Marx did not die in NOVA's explosion. He was barely alive and used NOVA's leftover parts and created himself again only tougher known as Marx Soul. Marx Soul is only fightable in The True Arena. After Marx Soul is beaten Marx Soul dies of being split in half.

Attacks
Marx has five attacks that follows a distinct pattern. He starts out by teleporting himself around the arena erratically and shoots out four blades immediately after doing so. He then flies up, going off the screen, and drops explosive seeds that grow into prickly vines. After the vines grow, an electrified shadow follows Kirby around the floor. After a few seconds, Marx emerges from the shadow. He then stops on the side of the screen, glows blue, and shoots a stream of arrows at Kirby. Marx flies off and then reappears soon after and spits a ball at the ground, which turns into two ice balls that slide across the floor upon landing on the ground. Finally, Marx glows, then spits out a giant horizontal beam. The pattern starts again. After taking enough damage, his pattern will become more random and unpredictable. He will also split in half, revealing a black hole. Kirby suffers very heavy damage if he falls into the black hole.