One-hit knockout move

One-hit knockout moves (Japanese: one-hit knockout move), commonly abbreviated as one-hit KO moves or OHKO moves, are moves that deal fixed damage to bring the target's HP to 0 and thus fainting, but have a particularly low chance to successfully hit the target.
==One-hit knockout move==
	
	
	
	
==In the core series==
One-hit KO moves deal fixed damage to bring the target to 0 HP (65535 in Generation I, equal to the target's current HP from Generation II onward). Despite being damaging moves, they do not consume a Gem. If the target faints, the game displays the message "It's a one-hit KO!" (or simply "One-hit KO!" in Generation I).
In Generations and , super effective one-hit knockout moves display the super effective message and play the appropriate sound effect. From Generation III onward, type-effectiveness messages no longer appear, but appropriate type-effectiveness sound effects still play.
In Generation III only, due to an oversight, a one-hit knockout move can fail to break a . If a Pokémon's substitute has more HP left than the Pokémon does, the substitute will not break when hit by a one-hit knockout move. This occurs because one-hit knockout moves deal damage equal to the Pokémon's current HP. This oversight was fixed in Generation IV.
Pokémon with the Ability are immune to one-hit KO moves. Since one-hit KO moves deal damage, a Focus Sash or the Ability can allow a Pokémon to survive such moves.
All OHKO moves have a base PP of 5. If an OHKO move becomes a Z-Move, it will have a base power of 180. If it becomes a Max Move, it will have a base power of 130.
One-hit KO moves will always fail against Dynamax Pokémon and Tera Raid bosses are unaffected by them. However, in Max Raid Battles, one-hit KO moves can deplete two bars of strength from a mysterious barrier.
OHKO moves are not featured in .
===Accuracy mechanics===
====Generation I====
All OHKO moves have an accuracy of 76/256 (approximately 30%), but they will automatically fail if the user's stat is lower than the target's. An X Accuracy will guarantee that all OHKO moves hit. The accuracy of OHKO moves in Generation I is affected by the standard and stats.
====Generation II====
OHKO moves automatically fail if the target has a higher level than the user. Their accuracy starts at 76/256 (approximately 30%) and increases by 2/256 (approximately 0.8%) for each level the user is above the target. This means that if the user's level is at least 90 levels greater than the target's, the move will have 100% accuracy. An X Accuracy will guarantee that all OHKO moves hit. The accuracy of OHKO moves in Generation II is affected by the standard accuracy and evasion stats.Ultimate Pokémon Center
====Generation III onward====
OHKO moves automatically fail if the target has a higher level than the user. Their accuracy starts at 30% and increases by 1% for each level the user is above the target. and stats no longer influence the move's accuracy, including modifiers that do not use stages, such as , Wide Lens, and . Effects that allow moves to always hit (such as or , but not ) still work on OHKO moves.
Since Generation VII, the accuracy of starts at 20% instead if the user is not . In addition, all OHKO moves now display their accuracy as 30% instead of —, although the calculation remains unchanged (except for Sheer Cold used by a non-Ice-type Pokémon).
==In spin-off games==
===Pokémon Mystery Dungeon series===
In the Pokémon Mystery Dungeon series of games, OHKO moves can hit regardless of level, although they are very prone to missing as always. When one hits, the game states that the target fainted through "calamitous damage" (changed to the standard "It's a one-hit KO!" in ). However, they actually do 9999 damage, which can be seen when the attacks are reflected by such as Counter Hitter if the Pokémon is revived by a .
==Trivia==
* can learn the most one-hit KO moves of any Pokémon (excluding Smeargle), being able to learn , , and .
* Starting in Generation VII, all one-hit KO moves are normally ineffective against one type. cannot affect Pokémon, and cannot affect Pokémon, and (starting in Generation VII) cannot affect Pokémon.
** Immunity to Sheer Cold is the only one not based on a type immunity, and thus cannot be bypassed (e.g. with , , or a Ring Target). Sheer Cold is also the only one-hit KO move where this immunity did not exist until after its debut generation.
* Starting in Generation VII, Sheer Cold is the only one-hit KO move with different accuracy mechanics from other one-hit KO moves.
* Sheer Cold is the only one-hit knockout move to be introduced after Generation I.
==In other languages==
==References==
==Related articles==
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de:K.O.-Attacken
es:Golpe fulminante
fr:OHKO
it:OHKO
ja:一撃必殺技
zh:一击必杀的招式