Marx

Marx (Known as Maruku, or Mark in Japan) is the final boss of Milky Way Wishes in Kirby Super Star and its remake, Kirby Super Star Ultra. He originally appeared as a small jester, somewhat resembling Mirror Kirby, balancing on a multicolored ball who asks Kirby to help him end a quarrel between the sun and moon. When Kirby listens to his plea and does as he says, he turns up just in time to initiate the final part of his devious plan, and reveals that he manipulated Kirby to gain power. Upon gaining power, Marx becomes a strong bat-like entity with flashing, multicolored "scales" on his recently-acquired wings and endless power. After Kirby defeats Marx he flies away and crashes into Nova, causing the great machine to blow up. Marx was believed to be destroyed in the crash, but he turns up much later in the Kirby Super Star Ultra sub-game The True Arena in a zombified form.

Marx, along with other various final bosses, are also shown in Kirby: Squeak Squad in one of the collectible pieces of artwork obtainable from treasure chests.

In CAMEO!
Marx is confirmed appear as a playable character in his first form.