Zero is the final boss and the true main antagonist of Kirby's Dream Land 3, he is the leader of Dark Matter as a species. He and Dark Matter tried to invade and corrupt Planet Popstar, as is a common ambition for Dark Matter beings to do with the planets, but his background and further purposes are unknown. While cunning, they seem to only have the simple-minded drive to conquer, spread their darkness, and turn others evil. Like all beings in the Kirby multiverse, 0 and Dark Matter are eventual descendants of Void, presumably originating from a reincarnation born by evil nature. However, their decision to do evil may be their own, as the first Dark Matter being shown had at least a petty motivation to conquer Dreamland, and Gooey has only shown doing good. The agency of their actions and the degree of control they have over it remain a mystery.

Tier: 5-A

Classification: Dark Matter being (Member of a species of mysterious dark  clouds), Dark Matter leader

Powers and Abilities: Superhuman physical characteristics, non-physical interaction (Scaling from Gooey, another dark matter. His influence is presumably affected ghosts such as Wapods), self-sustenance (Type 1), flight, spaceflight, inorganic physiology (Type 1), regeneration (Mid-High. Dark Matter are clouds, Zero has been stated to be one even with its eye visible and should have their regeneration), immorality (Types 2 and 3), intangibility (Scaling from Dark Matter his natural state may be intangible), possession, spatial manipulation (Presumably created the Hyper Zone), darkness manipulation, smoke manipulation (Can send mind-controlling clouds across a planet as big as Popstar), life creation (Created many individual, small dark matter so that they may tackle targets), corruption (Type 2), morality manipulation, madness manipulation (Type 2), limited shapeshifting (Can change his body from black to white), body control, blood manipulation (Can open parts of his body to shoot blood at targets from there), self-size manipulation (Initially appeared in the Hyper Zone, which was slightly smaller than Planet Popstar, and with Zero's red eye in turn being slightly smaller than it despite Zero being less than 5 meters in diameter), teleportation (Appeared instantly in front of Kirby among some flashes)

Attack Potency: Large Planet level (Fought Kirby with the Love-Love Stick and Gooey at once as a final boss, after they defeated King Dedede and a Dark Matter), able to ignore durability in some ways

Speed: Massively FTL+ (Flew to Planet Popstar while passing by stars in the background. Fights while flying, reacting to things like this and against foes who can dodge 0 trying to ram into them. Above regular Dark Matter, when some of them flew past 8 galaxies in 7 seconds. Kept up with Kirby and Gooey)

Lifting Strength: Unknown, far higher via Size manipulation (Similar to Dark Matter. Can turn the red part of his eye far bigger than the regular size of his whole body)

Striking Strength: Large Planet level (Can ram into Kirby and Gooey as an attack, and only attacks this way in his second phase)

Durability: Large Planet level (Took many hits from Kirby with the Love-Love Stick and Gooey at once during two phases, the first like normal, and in the second his iris and pupil rips out of the rest of his sclera body and keeps on attacking, this while every blow his foes land blows draws blood away, ending in 0 exploiting once defeated), regeneration makes it difficult to kill

Stamina: Very high (Comparable to Kirby. Could pull out its iris and pupil from its sclera body and continue fighting as just that)

Range: Standard Melee Range physically,  far higher with size manipulation, intergalactic with morality manipulation, madness manipulation, and projectiles (Dark Matter's influence affected 6 different world galaxies away from each other, Dark Matter was only physically present in the first and last of those worlds. 3 Dark Matter beings physically scattered the crystal shard around those 6 worlds, Zero is above them combined)

Standard Equipment: None notable

Intelligence: Gifted. Capable leader who organized planetary conquests

Standard Tactics: Zero starts his invasion by spreading mind-controlling dark clouds everywhere, something also done by the Dark Matter being who appeared in Dreamland 2 and Zero-Two, whose relation with Zero is unknown. Zero would then have the opposition fight the controlled victims while himself waits inside the Hyper Zone, an accumulation of dark clouds. Against Kirby and Gooey, who couldn't be controlled, Zero fought by firing projectiles of blood from his body, tackling them and creating mini Dark Matter so that they may tackle his foes. With enough damage, Zero can pull out its iris and pupil from its sclera body and continue fighting as just that, if only by tackling them.

Weakness: His eye seems to be his weak spot and will not regenerate if destroyed.

Notable Attacks and Techniques:

•Corruption: Despite not being visible where the victims are, Dark Matter can corrupt others with dark clouds and potentially without them; Dark Matter was stated to control others with dark clouds, this is shown in Dreamland 3 as a massive cloud of Dark Matter dispersing through the planet "luring the inhabitants of Popstar to evil". While going through the planet and fighting the victims, the Dark Matter beings and dark clouds are nowhere to be seen until defeating the bosses of that game and expelling Dark Matter's influence from sectors of the planet in Kirby 64: The Crystal Shards it's indicated many times in Kirby 64: The Crystal Shards Strategy Guide that Dark Matter had influenced beings on the 6 different planets Kirby & co traveled through, despite the fact that once again Dark Matter beings and dark clouds aren't shown while traveling for most of those planets (it should be noticed that said guide has several inaccuracies in it, however, it is still an official guide, the information is repeated numerous times, and the game alone already suggests this by having the randomly scattered Crystal Shards hidden and guarded by enemies. Additionally, Ripple Star, a planet that was completely took over and covered by Dark Matter, doesn't always show dark clouds in its levels). All of this indicates that Dark Matter are able to influence overs without physically entering inside of them, and presumably without the use of mind-controlling clouds.

°As Dark Matter's influence was stated to have affected Planet Popstar and other planets in general during Dream Land 2 and the Crystal Shards respectively, it presumably also affected Wapods and Noos, regular enemies present there that are ghosts. Though not all inhabitants from planets were affected.

°This corruption shows to work on robots such as Pluggs and HR-H in Crystal Shards.

°The dark clouds that mind controlled others seems to also be called Dark Matter, which is different than Dark Matter as a species and individual beings, although these clouds can regroup to form a Dark Matter being.

•Possession: Dark Matter can enter inside the body of a target and take control of it. While doing this, it is able to manipulate the victim's body, making it levitate, or transmute it entirely. Along with corruption, Dark Matter usually begins an encounter with others by possessing them as shown here, here and here. One took control of King Dedede off screen by possessing him in Dreamland and 2, and others along with Zero-Two possessed the Fairy Queen off screen, showing they're smart enough to target authority figures when invading. Although Zero hasn't used the power, similar & potentially related being called Zero-Two has, decreasing the size of their body to enter in the target. As Zero can make himself bigger, he may be able to do the same as Zero-Two.

Notable Victories:

Zero-Two (Kirby) Zero-Two's Profile