One-hit knockout move
One-hit knockout moves, commonly abbreviated as one-hit KO moves or OHKO moves, are moves whose effect is to immediately drop the target's HP to zero. When such a move successfully hits, the game will display the message "It's a one-hit KO!" (shortened to "One-hit KO!" in Generation I).
All OHKO moves have a base PP of 5. In Generation I, their accuracy was a constant 30%, but they would automatically fail if the user's Speed stat was lower than the target's. In later generations, this was changed to instead make them automatically fail if the target was of a higher level than the user, and the accuracy would instead start at 30% and increase by 1% for each level the user was above the target. Therefore, if the user was 70 levels higher than the target, the move would always hit.
The accuracy of OHKO moves is fixed to the above formula, and will not be affected by Accuracy or Evasion stat stages. For example, holding a Wide Lens will not make an OHKO move any more likely to hit, and using Double Team will not make it any less likely to hit. However, any effects that cause a move to completely ignore the accuracy check (such as No Guard or X Accuracy in Generation II or earlier) will allow an OHKO move to always hit.
Pokémon with the Ability Sturdy are unaffected by OHKO moves, unless the user negates that Ability through Mold Breaker or a variant of it. A Pokémon with Wonder Guard is also immune.[citation needed] At full HP, Pokémon holding a Focus Sash will instead be reduced to 1 HP by a OHKO move.
In the Mystery Dungeon 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 Gates to Infinity).
List of moves
| Fissure | Guillotine |
|---|---|
|
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| Ground | Normal |
| Horn Drill | Sheer Cold |
|---|---|
|
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| Normal | Ice |
Trivia
- These moves are often combined with Lock-On or Mind Reader to ensure it hits. Articuno can learn Mind Reader and Sheer Cold; in Generation II, Poliwrath can have Fissure and Mind Reader if it is taught Fissure in a Generation I game and traded over; and Smeargle can have any combination of the two types of move using Sketch.
- Lapras can learn the most one-hit KO moves of any Pokémon (excluding Smeargle), being able to learn Sheer Cold, Fissure, and Horn Drill.
- In Generation II, all one-hit KO moves were ineffective against one type of Pokémon. Guillotine and Horn Drill could not affect Ghost-type Pokémon unless Foresight was also used, and Fissure could not affect Flying-type Pokémon. Sheer Cold (introduced in Generation III) broke this pattern, as no type is immune to Ice-type attacks.
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This article is part of Project Moves and Abilities, a Bulbapedia project that aims to write comprehensive articles on two related aspects of the Pokémon games. |