Editing 0²

{{Infobox-Boss
|image= [[File:K64 Dark Star screenshot 06.png|300px]]
|caption=[[Kirby]] and [[Ribbon]] against '''0²''', as seen in ''[[Kirby 64: The Crystal Shards]]''. 
|game1=''[[Kirby 64: The Crystal Shards]]'' (2000)
|game= <small>''[[Kirby Star Allies]]'' (2018) ([[Celebration Picture|Bad Boss Brothers]] cameo)<br>''[[Kirby's Dream Buffet]]'' (2022) (mentioned)</small>
|weakness= [[Ribbon's Crystal]]
|enemy info card=[[File:K64 Enemy Info Card 9.png]]
|relative=[[Zero]], [[Dark Matter (cloud)|Dark Matter]], [[Miracle Matter]]
|similar=[[Star Dream]], [[Void Termina]], [[Void Soul]], [[Void]]
|theme music=[[File:K64 02 Battle.oga]]
|theme title=[[0² Battle]]
|description=Clip of 0²'s battle theme from ''[[Kirby 64: The Crystal Shards]]''
}}
[[File:K64 02 Sprite.png]] '''0²''' (also spelled '''O²'''<ref>Taken from ''[[Kirby's Dream Collection Special Edition Compilation Soundtrack]]''</ref>, '''02'''<ref>Taken from the ''[[Super Smash Bros. Ultimate]]'' track list</ref>, and '''Zero2'''<ref>Name taken from one of the [[CPU]] names in ''[[Kirby's Dream Buffet]]''</ref>) is the final [[boss]] of ''[[Kirby 64: The Crystal Shards]]'', who inhabits the center of the final world of [[Dark Star]] and whose defeat causes the star to explode. It bears some similarities to [[Zero]] from ''[[Kirby's Dream Land 3]]'', but it is not known if they are meant to be the same character. In order to battle 0² and obtain the true ending of the game, all of the [[Crystal Shard]]s from each previous star must be collected and then [[Miracle Matter]] defeated. 0² is also faced as the last opponent in the [[Boss Endurance|Boss Battles]] mode.

0² also makes cameo appearances in the "Chasing Our Dreams" and "Bad Boss Brothers" [[Celebration Picture]]s in ''[[Kirby Star Allies]]''.

==Physical appearance==
0² has a halo, a pair of wings (which are dark red at the tips), and a dark red eye. It also has a bandage under its halo and a spike on its underside, which transforms into a spiky green protrusion when its halo is removed (this protrusion is also its weak point). 0² releases blood (confirmed to be such by the credits illustration of 0² and the game's ESRB rating in ''[[Kirby's Dream Collection Special Edition]]'') when its eye is hit, though this does not actually damage the boss. Its halo and wings may suggest that 0² is a reincarnation or angelic form of Zero.

==Boss battle==
[[File:K64 Dark Star screenshot 10.png|left|150px|thumb|Attacking 0²'s underside once exposed is the only way to directly damage it.]]
0² has only two forms of attack: firing explosive orbs from its eye, and releasing green gas when its green tail is exposed. Both of these projectiles will damage Kirby on contact, though they can be easily avoided with continuous movement.

Kirby uses [[Ribbon's Crystal]] as a weapon during the battle, and [[Ribbon]] uses her wings to guide Kirby around. 0² starts off impervious to direct damage. In order to reveal its weak point, Kirby can stun it by striking its eye 30 times. While 0² is stunned, Kirby and Ribbon can attack its wings to disable them or fly to its halo and shoot it 10 times, after which it vanishes and 0² flips over revealing its spiny green tail. Kirby must deal enough damage to the tail before it retracts, repeating the battle cycle. If both of 0²'s wings are disabled, it will move much more slowly, allowing Kirby to get hits in on its halo without having to shoot its eye first. After enough damage is done to the tail, 0² is defeated, and it explodes with the Dark Star.

If the L or R buttons are pressed during the fight in the [[Virtual Console]] versions, the camera will rotate.

{{clear|left}}

==Music==
{{main|0² Battle}}
The boss battle theme of 0² is composed by [[Jun Ishikawa]] and titled '''0² Battle'''. The original track can be found as '''Music 31''' in the [[Jukebox|Sound Check]] mode of ''Kirby 64: The Crystal Shards''.

This theme has been remixed in ''[[Super Smash Bros. Brawl]]'', and the ''Brawl'' remix has later been reused in ''[[Super Smash Bros. for Nintendo 3DS / Wii U|Super Smash Bros. for Wii U]]'' and ''[[Super Smash Bros. Ultimate]]''. This theme has also been remixed for both ''[[Kirby Star Allies]]'' and the [[Kirby Café]].

==Trivia==
[[File:K64 Dark Star screenshot 05.png|thumb|right|200px|0²'s strange face before the fight starts]]
*If the player pauses the game in Dark Star, the "Try Again" option (which functions the same as "Quit" in other games) will be replaced by "Tough It Out!" (がんばる, "do your best", in Japanese), which functions the same as selecting the "Continue" button, so the player cannot quit the battle or leave the star in question.
**This does not happen in the game's [[Boss Endurance#Kirby 64: The Crystal Shards|Boss Battles]] mode, as pausing the game there even when battling 0² will display an "Accept Defeat" option, which lets the player get out of the battle as if Kirby ran out of health.
*Before the fight with 0² begins, the boss briefly shows a strange less-threatening face, with two black dots for eyes and the closed main eye serving as a smiling mouth. Why it briefly looks like this before changing to its look during the fight is unknown, though it may be a feint based on 0²'s "concept art" in the [[False Ending]] credits of the game.
**This same face would be referenced much later by [[Void Termina]] and [[Void Soul]] during their final phases. As [[Void]], he also makes the face in his pause screen.
**Additionally, the winged angel form of Void Termina's wings somewhat resemble those of 0², though much more substantial in nature.
*The background for this boss fight is the same as the pool on the ground of [[The Divine Terminus]] in [[Heroes in Another Dimension]] once three dimensions are cleared and when fighting [[Morpho Knight]] in either [[Guest Star ???? Star Allies Go!]] (version 3.0.0. only) or Soul Melter of [[The Ultimate Choice]] as [[Adeleine]] & [[Ribbon]], [[Dark Meta Knight]] and [[Daroach]].
*The official guide for ''Kirby 64: The Crystal Shards'' by [[wikipedia:Prima Games|Prima Games]] mentions that 0² is "a benevolent creature who rarely presents trouble in the cloud levels of [[Shiver Star]]", which is untrue.
*In ''[[Kirby's Dream Buffet]]'', one of the randomly selected names for a [[CPU]] Kirby during online matches is "Zero2sOwie", referencing the bandage on its head.

== Gallery ==
<gallery>
K64 02 credits sketch.png|Sketch of 0² from the [[False Ending]] credits of ''Kirby 64: The Crystal Shards''
K64 02 credits illustration.png|Illustration of 0² from the true ending credits of ''Kirby 64: The Crystal Shards''
Bad Boss Brothers.png|0² appears in the upper portion of the [[Celebration Picture|Bad Boss Brothers]] illustration in ''[[Kirby Star Allies]]''
</gallery>

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[[Category:Bosses in Kirby 64: The Crystal Shards]]
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