Editing One-hit KO

{{ArticleIcons|series=y}}
{{incomplete|Needs some more info from Ultimate}}
{{disambig2|attacks with enough knockback to KO in one hit|KOs that occur instantly and bypass all knockback|Instant KO}}
:''For the smasher '''OHKO''', see {{Sm|Okoru}}.''
A '''one-hit KO''', commonly abbreviated as '''OHKO''' (also referred to as an ''Instant KO'' in ''Melee''), is an attack in the ''{{b|Super Smash Bros.|series}}'' games with such high base [[knockback]] that it [[KO]]s an opponent at 0%. Such attacks currently exist in every installment of the series. However, moves with the potential to OHKO are not necessarily guaranteed to do so, and may fail to OHKO under the following circumstances:
*The opponent [[tech]]s, [[DI]]s, utilizes [[momentum cancel]]ling, and/or [[crouch cancel]]s to reduce the knockback or alter the trajectory of the attack.
*The opponent is flung into a wall, which absorbs enough knockback to prevent the OHKO.
*Knockback may be insufficient to KO at 0% on very large stages (e.g. [[Temple]], [[New Pork City]], and [[75m]]), or from the far edge of a stage.
*Knockback may be insufficient to KO at 0% if the attack had already been landed previously (due to [[stale-move negation]]).
*Knockback may be insufficient to KO [[Weight|heavy]] characters at 0%. 
*Opponents are under an effect that makes them more resilient (such as being [[Super Mushroom|giant]], [[metal]], or in an event that reduces the knockback they sustain), or the player is weakened (such as being [[Poison Mushroom|tiny]] or given a lower [[handicap]]).
*The [[launch rate]] is lower than standard, reducing knockback.

The general rule for a move to be considered a one-hit KO is being able to KO an average-weight character, such as [[Mario]], at 0% [[damage]] from the center of [[Final Destination]] under standard conditions as mentioned above. Another common standard is to compare the move's knockback to the [[smash attack]] of the [[Home-Run Bat]], one of the few moves intended to be the quintessential OHKO by the developers.

Moves or hazards that inflict no knockback are not considered to meet the definition of one-"''hit''" KO's; for example, being flown off the screen by the [[Landmaster]] or eaten by the [[Summit]]'s [[Fish]] or [[Distant Planet]]'s [[Bulborb]] are not listed below.

==In ''[[Super Smash Bros.]]''==
Moves that KO'd at 0% were almost nonexistent in the original Smash. In fact, aside from the Home-Run Bat, only one move in the game is able to OHKO, under uncommon conditions:
===Items===
*A [[smash attack]] with the [[Home-Run Bat]].
*If Fox uses [[Reflector (Fox)|Reflector]] on a walking [[Bob-omb]], he (as well as any character caught in the blast radius) will be OHKO'd.
*If 2 Foxes use Reflector on a Green Shell, it will eventually gain OHKO power after 3-4 reflects.

==In ''[[Super Smash Bros. Melee]]''==
Unlike in ''Smash 64'', there are multiple moves that can OHKO in ''Melee''. They still remain rare however.

===Playable characters' moves===
*{{SSBM|Roy}}'s fully charged [[Flare Blade]].
*{{SSBM|Mr. Game & Watch}}'s fully loaded [[Oil Panic]] after absorbing three strong projectiles (such as three [[PK Flash]]es).
*Roy's [[Counter]] upon countering an extremely powerful attack; a hitbox that deals around 35% damage will result in an OHKO if countered (such as a smash thrown Bob-omb).

===Items/Enemies===
*A [[smash attack]] with the [[Home-Run Bat]].
*Getting caught in [[Lugia]]'s Aeroblast (can whiff if the player is hit at the left or right endpoint of its attack).
*Touching [[Moltres]].
*A thrown [[Polar Bear]].

===Stage hazards===
*[[Banzai Bill]]'s explosion on [[Princess Peach's Castle]] (if all hits connect).
*In [[Flat Zone]], if a falling tool is launched at enough speed (after either being hit by an extremely powerful attack such as a Home-Run Bat swing, or being launched after receiving enough damage), it will OHKO anyone it slams into.

==In ''[[Super Smash Bros. Brawl]]''==
''Brawl'' continued the trend of adding several OHKOs into the game, resulting in a great number of them (especially in [[The Subspace Emissary]]. However, the majority are [[Final Smash]]es, [[item]]s, [[stage hazard]]s, [[enemy]] and [[boss]] attacks, with very few being standard moves of playable characters. 
In higher [[Difficulty|difficulties]] of The Subspace Emissary (mostly Very Hard or Intense), several enemy attacks are OHKO, as well as many boss attacks. Also, most of [[Tabuu]]'s moves are guaranteed OHKO, some of them even in the higher difficulties of [[Boss Battle]].

===Playable characters' standard moves===
*{{SSBB|Ike}}'s stage 8 [[Eruption]] (stage 7 Eruption can't be classified this way - though it can OHKO light characters when reversed, in midair or in particular situations, it usually KOs [[Mario]] at 8%). If Ike gets absorbed by [[Kirby]], the latter's stage 8 Eruption normally loses its OHKO power (except when reversed or used in midair).
*{{SSBB|Mr. Game & Watch}}'s fully loaded [[Oil Panic]] after absorbing three strong projectiles (such as [[PK Flash]]).
*{{SSBB|Ganondorf}}'s reverse or midair Warlock Punch.
*{{SSBB|Ivysaur}}'s [[up smash]] is the most powerful in the game, and can OHKO every character in the lower [[Difficulty|difficulties]] of [[Classic Mode|Classic]] and [[All-Star Mode|All Star]] mode (Easy and Normal only, or Hard in a few particular situations; however, it usually KOs characters starting from 18% in normal Brawls, with some notable exceptions).
*{{SSBB|Jigglypuff}}’s [[Rollout]] and [[Rest]] may OHKO very light characters in some situations, but only when perfectly framed and activated while in contact with the opponent. Also, Rollout needs to hit the opponent throughout its path, from the beginning to the end, to gain its full power. These moves are a guaranteed OHKO for every character in the lower [[Difficulty|difficulties]] of [[Classic Mode|Classic]] and [[All-Star Mode|All Star]] mode (Easy and Normal only, or Hard in a few particular situations).
*{{SSBB|Pikachu}}’s Thunder if the enemy is near to the upper lines or in stages with an high platform, such as [[75 m]], [[Spear Pillar]] or [[Onett]].
*The following [[counterattack]]s:
**Ike's Counter upon countering an extremely powerful attack (a hitbox that deals at least ~45% damage).
**{{SSBB|Marth}}'s Counter upon countering an even more powerful attack (a hitbox that deals at least ~50% damage).
*[[Self-destruct]] 
**If {{SSBB|Jigglypuff}}’s [[Shield]] is kept for too much time or broken by an attack, Jigglypuff shall suffer a self-OKHO, being launched with massive vertical knockback (but wuthout any damage).


Contrary to common belief, Mr. Game & Watch's [[Judge]] #9 is not an OHKO, having very high knockback but not quite enough to qualify under the required conditions (although it may OHKO very light characters in particular situations, it usually KOs [[Jigglypuff]] at 10%).
Also, {{SSBB|Bowser}}’s Koopa Claw should be an invariable OHKO if used in midair, but it is classified in a special category: [[Sacrificial KO]].

===Final Smashes===
*Marth's [[Critical Hit]] (even on Giant characters). It is the most powerful playable attack of all Smash games.
*{{SSBB|Ganondorf}}'s [[Beast Ganon]] (if most hitboxes land). If a character paralyzed by Beast Ganon is not hit by the charge afterward, it can be inflicted with a [[meteor smash]] of OHKO power.
*{{SSBB|Lucario}}'s [[Aura Storm]] at full power when most hits connect, or when Lucario has suffered enough damage prior the [[Final Smash]].
*{{SSBB|Pokémon Trainer}}'s [[Triple Finish]] if most hits connect.
*{{SSBB|Zelda}}'s and *{{SSBB|Sheik}}'s [[Light Arrow]] (barely in OHKO threshold, easily [[DI]]ed).
*[[Wario-Man]]'s fully charged [[Wario Waft]].
*{{SSBB|Samus}}'s [[Zero Laser]] if most hits connect or if the player is pushed over the ending line. 
*Touching {{SSBB|Zero Suit Samus}} while she is performing [[Power Suit Samus]].
*{{SSBB|Luigi}}'s [[up smash]] during [[Negative Zone]].
*{{SSBB|Mario}}'s [[Mario Finale]] if the enemy is trapped in the flame vortex and pushed offscreen.
*{{SSBB|Ike}}'s [[Great Aether]] when used in small stages or when there is an high platform; it is an invariable OHKO in [[75 m]], [[Spear Pillar]] and [[Onett]].

[[Giga Bowser]]’s Koopa Claw should be an invariable OHKO if used in midair, but it is classified in a special category: [[Sacrificial KO]].

===Items===
*The [[Dragoon]].
*A [[smash attack]] with the [[Home-Run Bat]].
*Touching [[Moltres]], except for the lower body (even on Giant characters). If a character touches Moltres’ lower body, he is inflicted a [[meteor smash]] with OHKO power. If the character is meteor smashed where Moltres is still above him, he will suffer up to 160% damage before being KOed. Same as [[Melee]].
*Getting caught in [[Lugia]]'s Aeroblast (even for Giant characters), unless the character is hit at the left or right endpoint of the attack. Touching Lugia's body also gives massive knockback, but normally insufficient to OHKO like [[Moltres]]. Same as [[Melee]].
*[[Suicune]]'s Aurora Beam (even for Giant characters). This attack instantly {{Freezing|freezes}} and OHKOs every character caught within it's range (similar to [[Articuno]]'s Sheer Cold but even more powerful and long-ranged).
*[[Deoxys]]'s Hyper Beam (even for Giant characters), both the single initial blast and the following multi-hitting blast.
*[[Electrode]]'s explosion or after being smash thrown.
*A trown [[Bonsly]].
*[[Knuckle Joe]]'s Vulcan Jab to Rising Break attack.
*If {{SSBB|Wario}} runs over a buried [[Pitfall]] while riding on his [[Wario Bike]], he will be sent flying at OHKO power.
*If a [[Pitfall]] is thrown on a flying character, he will be [[meteor smash|meteor smashed]] with an OHKO potential if he is midair.
*A full charged [[Hothead]] is an OHKO for every character caught in its path. It is reached during the last seconds only, when the sphere sparkles and glows, or with the following method.
*If an uncharged [[Hothead]] is hit by a fire-based hitbox that deals over 30% damage (such as Ike's stage 7-9 Eruption), it will OHKO both when smash thrown and when traversing the stage. Any sparks it gives off while traversing the stage at this strength will also OHKO any character (like the description above but during the whole time, and not only the last seconds).
*If a [[Soccer Ball]] is launched at enough speed (after either being hit by an extremely powerful attack such as [[forward smash]], a Home Run bat swing, or being launched after receiving enough damage), it will OHKO anyone it slams into.

===Stage hazards===
*Touching or being bitten by the [[Ultimate Chimera]] in [[New Pork City]] (even for Giant characters). It is the most powerful attack in all the Smash games along with [[Tabuu]]’s [[Off Waves]], both for knockback (being able to OHKO even {{Metal Box|Metal}} characters in some situations) and damage (an incredible 100% or 200%).
*[[Dialga]]'s Roar of Time and [[Palkia]]'s Spacial Rend in [[Spear Pillar]] (even for Giant characters) if most hits connect, both the vertical and the horizontal beams.
*[[Dialga]]'s Overheat in [[Spear Pillar]] (even on Giant characters). The attack deals from 70% to 100% damage and immense knockback; in some cases it may OHKO even {{Metal Box|Metal}} characters, due to the fact that Dialga is on an high platform, near to the upper lines. Also, simply touching Dialga's body inflicts massive knockback and damage (as for [[Palkia]] and [[Cresselia]]), but becomes an invariable OKHO when Dialga is using Overheat, not so different from being hit by the attack itself.
*When [[Cresselia]], [[Dialga]] and [[Palkia]] revert the stage in [[Spear Pillar]], characters who are midair or near the upper lines shall be OHKOed.
*The explosion of the [[Bridge of Elvin]]’s bomb (even for Giant characters). It deals enormous knockback and immense damage (100%) to all the characters within its range.
*Touching the hull of the [[Pirate Ship]].
*The first and the fourth spike on [[Rumble Falls]] (can easily be teched).

Despite KOing at any percentual, the [[fish]] in [[Summit]] is not an OHKO, but an [[Instant KO|instant KO]], since the player is swallowed and not hit in the classical meaning.
The same applies to the river’s current in [[Jungle Japes]], the ships in [[Big Blue]] and the moving screen in [[Rainbow Cruise]], which all lead characters beyond the bottom lines, KOing them regardless of damage.

===The Subspace Emissary’s hazards===
*Touching the [[Porky Statue]] on Normal or higher [[Difficulty|difficulties]] in [[The Subspace Emissary]]. The Porky Statue can also be considered an [[enemy]] since it chases the player.
*Being crushed.

===Enemies===
*[[Big Primid]]'s punch on Intense [[Difficulty|difficulty]] in [[The Subspace Emissary]].
*The forward smash of all the four [[R.O.B.]] species on Intense [[Difficulty|difficulty]]  in [[The Subspace Emissary]].
*[[Armank]]'s main attack on Very Hard and Intense  [[Difficulty|difficulties]]  in [[The Subspace Emissary]].
*[[Armight]]'s double blade attack on Intense  [[Difficulty|difficulty]]  in [[The Subspace Emissary]].
*[[Auroros]]'s flying attack on Intense  [[Difficulty|difficulty]]  in [[The Subspace Emissary]].
*[[Autolance]]'s slash on Very Hard or Intense  [[Difficulty|difficulties]]  in [[The Subspace Emissary]].
*Touching a [[Bombed]] makes it explode with OHKO power on Very Hard and Intense  [[Difficulty|difficulties]]  in [[The Subspace Emissary]], even when fighting against [[Porky]].
*[[Floow]]'s mind attack (if most hits connect) on Intense  [[Difficulty|difficulty]]  in [[The Subspace Emissary]], or the combined assault of multiple Floows in every [[Difficulty|difficulty]].
*Several other attacks of the [[Subspace Army]]'s enemies on Very Hard and Intense  [[Difficulty|difficulties]]  in [[The Subspace Emissary]], also depending on stage and character.
*Touching the [[Porky Statue]] on Normal or higher [[Difficulty|difficulties]]  in [[The Subspace Emissary]]. The Porky Statue can also be considered a stage hazard, although it chases the player.


===Bosses===
*[[Tabuu]]'s [[Off Waves]] on Normal or higher [[Difficulty|difficulties]] in [[The Subspace Emissary]], or on Very Hard and Intense difficulties in [[Boss Battles Mode]].
*Tabuu's Golden Bracket, Chain of Light and Dragon Laser attacks on Intense difficulty in the SSE.
*[[Galleom]]'s attack when he stiffens and falls on the player on Intense difficulty in the SSE.
*Galleom's tornado spin on Intense difficulty in the SSE (if most hits connect).

===Video===
The following video demonstrates all the moves and hazards that KO at 0% in ''Brawl'':

{{#widget:YouTube|id=EpyjRINBJbk}}

==In ''[[Super Smash Bros. 4]]''==
Like ''Brawl'', ''SSB4'' continues to add OHKOs to the game.

===Playable characters' standard moves===
*{{SSB4|Roy}}'s almost fully charged and fully charged [[Flare Blade]] when sweetspotted.
*{{SSB4|Mr. Game & Watch}}'s fully loaded [[Oil Panic]] after [[absorb]]ing three medium power projectiles or one very strong one.
*{{SSB4|Villager}}'s [[Pocket]] after it has absorbed a particularly strong projectile, most notably [[Timber]]. Powerful projectiles released by Pocket that can still be reflected will also OHKO, such as {{SSB4|Zelda}}'s fully charged [[Phantom Slash]].
**Many other [[reflector]]s also share this behaviour, especially {{SSB4|Ness}}'s bat.
*The following [[counterattack]]s:
**{{SSB4|Ike}}'s [[Smash Counter]] and {{SSB4|Shulk}}'s [[Power Vision]] custom moves upon countering a hitbox that deals 30% damage or more.
**{{SSB4|Corrin}}'s [[Counter Surge]], Ike and Roy's [[Counter]], and Shulk's [[Vision]] upon countering a hitbox that deals 35% damage or more. These counters technically have varying degrees of knockback, but they nevertheless achieve a KO at 0% without DI.
**{{SSB4|Mii Swordfighter}}'s [[Blade Counter]] upon countering a hitbox that deals 37% damage or more.
**{{SSB4|Lucina}} and {{SSB4|Marth}}'s Counter, {{SSB4|Little Mac}}'s [[Slip Counter]], and {{SSB4|Palutena}}'s {{B|Counter|Palutena}} upon dealing the 50% damage cap with their counters (this requires countering a hitbox that deals at least ~38.5% damage for Little Mac and Palutena, and at least 40% damage with Lucina and Marth).
**{{SSB4|Peach}}'s [[Toad (move)|Toad]] will KO Ness at 0% if she counterattacks his fully charged forward smash while she is wearing a [[Franklin Badge]].
Contrary to its name and intention, Little Mac's [[KO Uppercut]] does not KO until above about 30% damage. At 0%, it falls short of the necessary amount of knockback, even to a character as light as {{SSB4|Jigglypuff}}, KOing it only at 12%.
*[[Self-destruct]] 
**If {{SSB4|Jigglypuff}}’s [[Shield]] is kept for too much time or broken by an attack, Jigglypuff shall suffer a self-OKHO, being launched with massive vertical knockback (but without any damage).

===Playable characters' moves [with Rage applied]===
While the following moves do not, under normal circumstances, guarantee an OHKO state, with [[Rage]] they can perform an OHKO:
*{{SSB4|Lucario}}'s Forward Smash, fully charged. Aura and rage stack.
*{{SSB4|Ganondorf}}'s reversed aerial [[Warlock Punch]].
*{{SSB4|Kirby}}'s [[Giant Hammer]].
*{{SSB4|Mr. Game and Watch}}'s [[Judge]] 9

===Final Smashes===
*[[Giga Mac]]'s fully charged [[Straight Lunge]] sweetspot, fully charged up smash when sweetspotted, and forward smash when angled up or horizontally.
*{{SSB4|Marth}} and {{SSB4|Lucina}}'s [[Critical Hit]].
*{{SSB4|Shulk}}'s [[Chain Attack]] when boosted with the [[Monado Arts#Customization|Hyper Smash Monado Art]] (Extremely frame-precise, as the final hit must land before the Art expires, as shown in [https://youtu.be/F89Sm_jA38g?t=111 this demonstration video]).
*[[Wario-Man]]'s fully charged [[Wario Waft]].

===Items/Enemies===
*The [[Daybreak]]'s sweet spot. 
*The Dragoon.
*A [[smash attack]] with the [[Home-Run Bat]].
*[[Electrode]]'s explosion after being smash thrown.
*If the Hothead is powered up significantly (30% total or higher), it will gain OHKO power.
*If a [[Soccer Ball]] is launched at enough speed (after either being hit by an extremely powerful attack such as a Home-Run Bat, or being launched after receiving enough damage), it will OHKO anyone it slams into.
*[[Smash attack]]s when boosted by the [[Black Knight]] item from [[Smash Tour]].

The [[Beetle]] and [[Boss Galaga]] items can carry players past the upper [[blast line]], but as they inflict no knockback they are not one-"''hit''" KOs and both can be escaped by button mashing.

===Stage hazards===
*Touching the hull of the boat on [[Wuhu Island]].
*Touching the hull of the [[Pirate Ship]].
*Odin's Zantetsuken attack on the [[Midgar]] stage (top platform only).

===Other===
While it isn't accessible in regular battles, the [[Target Blast bomb|bomb]] used in the [[Target Blast]] stage apparently has more than enough power to OHKO under normal conditions.

===Bosses===
*[[Master Core]]'s final attack if the player does not defeat it in time (about 45 seconds).

==In ''[[Super Smash Bros. Ultimate]]''==
Like ''SSB4'', ''Ultimate'' continues to add OHKOs to the game.
===Playable characters' moves===
*{{SSBU|Roy}} and {{SSBU|Chrom}}'s fully charged [[Flare Blade]].
*The following [[counterattack]]s:
**{{SSBU|Roy}} and {{SSBU|Chrom}}'s [[Counter]], {{SSBU|Joker}}'s [[Rebel's Guard|Tetrakarn]] with [[Arsene]], {{SSBU|Shulk}}'s [[Vision]] with [[Monado Arts|Smash Art]], and {{SSBU|Mii Brawler}}'s [[Counter Throw]] countering a hitbox that deals around 35% damage or more.
**{{SSBU|Corrin}}'s [[Counter Surge]] and {{SSBU|Ike}}'s [[Counter]] countering a hitbox dealing around 40% damage or more.
**{{SSBU|Marth}} and {{SSBU|Lucina}}'s [[Counter]] countering a hitbox dealing around 43% damage or more.
**Any sufficiently strong or repeatedly reflected projectile when reflected.
*{{SSBU|R.O.B.}}'s fully-charged [[Gyro]] will OHKO opponents beyond its maximum speed. However, it requires a much stronger windboxes consecutively at the gyro making it extremely difficult to achieve its power. [https://youtu.be/-vNLNngj4n8]
*[[Self-destruct]] 
**If {{SSBU|Jigglypuff}}’s [[Shield]] is kept for too much time or broken by an attack, Jigglypuff shall suffer a self-OKHO, being launched with massive vertical knockback (but without any damage).

<!--Please do not add Whack or Thwack. They are instant KOs, not one-hit KOs.-->

===Playable characters' moves [with Rage applied]===
*{{SSBU|Hero}}'s [[Command Selection|Hatchet Man]] with [[Command Selection|Psyche Up and Oomph]] active.
*{{SSBU|Mr. Game & Watch}}'s [[Oil Panic]] if absorbed a strong enough projectile like {{SSBU|Hero}}'s [[Frizz|Kafrizz]].
*{{SSBU|Mr. Game & Watch}}'s Judge 9.

===Final Smashes===
*{{SSBU|Marth}} and {{SSBU|Lucina}}'s [[Critical Hit]].
*{{SSBU|Lucario}}'s [[Aura Storm]] at max aura.
*{{SSBU|Donkey Kong}}'s [[Jungle Rush]] at max rage.
*{{SSBU|Little Mac}}'s [[Giga Mac Rush]] at max rage.

===Items/Enemies===
*A smash attack with the [[Home-Run Bat]].
*[[Electrode]]'s explosion when smash thrown.
*The [[Dragoon]].
*The [[Daybreak]]'s sweet spot.
*If the [[Hothead]] is powered up significantly, it will OHKO any fighter it touches.

===Stage hazards===
*Touching the hull of the [[Pirate Ship]].
*Touching the hull of the boat on [[Wuhu Island]].
*Getting hit by a [[Klaptrap]] on [[Jungle Japes]].

===Bosses===
*[[Galeem]]'s Lens Flare with weaker or no spirits.
===Other===
While inaccessible in a regular fashion without hacking, the gun found on the [[Stage#In_Ultimate_3|Free the Spirit screen's stage]] is programmed in as its own usable item, inflicting 25% damage with OHKO power. This situation is similar to ''Smash 4''{{'}}s Target Blast bomb.

{{#widget:YouTube|id=W5d-BGAls_s}}

===Video===
The following video demonstrates several of the moves and hazards in ''Ultimate'' that inflict enough knockback to KO at 0%, alongside some powerful moves that don't. However, it also includes a few moves and hazards that do not inflict any knockback:

{{#widget:YouTube|id=Y5IIRDd5ggY}}

==References==
<references />

[[Category:Attacks]]
	You aren't logged in. While it's not a requirement to create an account, doing so makes it a lot easier to keep track of your edits and a lot harder to confuse you with someone else. If you edit without being logged in, your IP address will be recorded in the page's edit history.
	Log in	Create account
Insert common text
Signature	~~~~
Symbols	£ ¥ ° ± × ÷ € ≈ ≠ ≤ ≥
Diacritics	À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Œ Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô õ ö ø œ ù ú û ü ý þ ÿ
Wikitext	[] [[]] \| [[Category:]] [[File:]] #REDIRECT: [[]] {\| \|- \|\| \|}
Templates	{{cleanup}} {{image}} {{reflist}} {{stub}} {{d}} {{delete}}
Formatting	<!----> <br> <code></code> <gallery></gallery> <nowiki></nowiki> <ref></ref> <references/> {{#widget:YouTube\|id=}}
Substitution	<includeonly></includeonly> <noinclude></noinclude>