Marx Soul is a boss that appears exclusively in The True Arena of Kirby Super Star Ultra, serving as the game's true final boss. Marx Soul is a stronger, zombified version of Marx, mutated by the power of the destroyed Galactic Nova, and this version of Marx can be specified as a grotesque monstrosity. He fights the same as his un-mutated form, but his attacks are much stronger, and he moves in a faster, more chaotic manner. His health (630) is also greatly higher than Marx's (350).
He can now turn into paint blobs that give the Paint Ability. He also is purple instead of lavender. His wings are different and he now has a necklace that appears to be made of parts from Nova. His laugh is also different. After finishing off the demonic beast, he lets out a bloodcurdling screech, slowly splits in half while turning dark red (as well as his necklace) and explodes, destroying the entire arena in the process.
This table describes all of the demonic boss' attacks. Most are stronger, faster, and/or longer ranged versions of the original Marx's attacks, but some are unique to him.
|Marx Soul's attacks|
|Shooter Cutter||Marx Soul appears to teleport, but instead shoots out four cutters. He then repeats the attack.
|Seed Attack||Marx Soul flies off the screen, dropping six damaging seeds in random places in the arena. About a second later, thick rose vines spring up from each of the seeds' locations.|
|Shadow Uppercut||Marx Soul appears as a flashing circle on the ground that follows Kirby. After a few seconds, he springs up in an attempt to ram into Kirby.|
|Marx Laser||Marx Soul assumes a strange expression, then fires an enormous, damaging beam out of his mouth.
|Jester Ball Spit-Drop (Ice Bomb)||Marx Soul assumes a strange expression, following Kirby, then drops a bomb out of his mouth. After reaching Kirby's height, it explodes into two shockwaves that may freeze Kirby if not guarded or dodged.
|Arrow Arrow||Marx Soul flashes, then releases hundreds of damaging arrows from his body.|
|Black Hole||Marx Soul splits in half, creating a black hole. If Kirby is sucked in, he is transported to an alternate dimension in which he takes massive damage.
|Splash Marx||Marx Soul splits in half, creating magenta and blue paint blobs. After disappearing, many similar damaging paint blobs fall from the ceiling, increasing in volume as the attack goes on.|
|Deadly Ball||Marx Soul splits in half, creating magenta and blue comets. After a few seconds, the two comets fly in one after the other, including a sound effect that resembles Marx Soul's laugh, however the sound effect is more high pitched in the magenta comet. He only uses this attack when he has lost half of his stamina.
Boss image from The True Arena
- In Milky Way Wishes, if the player looks closely a split second before Marx transforms into his first powered-up form, he can be seen looking extremely similar to Marx Soul. This is present even in the original Kirby Super Star.
- Marx Soul is the first Soul Boss in the Kirby main-series. The first one in the whole series is Drawcia Soul from Kirby: Canvas Curse which is a spin-off.
- Marx Soul does not have any official artwork.
Names in other languages
|French||Max Ultra||Ultra Marx|
|German||Max Ultra||Ultra Marx|
|Italian||Anima di Mark||Soul of Marx|
|Spanish||Espíritu de Marx||Spirit of Marx|