One-hit knockout move

One-hit knockout moves, commonly abbreviated as OHKO moves, are moves that, when used, cause the target's HP to drop to zero regardless of their stats. They are all highly inaccurate: given that their effect is to immediately make the target faint, to have them much more accurate would further encourage their use to quickly and easily finish battles.

When used, they will always fail if the level of the target is higher than the level of the user, except in Generation I, where they would fail if the user's Speed stat was lower than the target's.

All one-hit knockout moves have a base of 5 PP. Its accuracy is at least 30% and grows slightly the lower the target Pokémon's level is relative to the attacking Pokémon. A level difference of 70 will deliver an accuracy of 100%. It is not affected by changes in accuracy or evasion stats and is calculated as follows:

Accuracy = ((User's level - Target's level) + 30)%

Pokémon with the ability Wonder Guard are unaffected by them, unless the user has the ability Mold Breaker or a variant of it. A Pokémon with Sturdy is also immune. At full HP Pokémon holding a Focus Sash will instead be reduced to 1 HP by a OHKO move.

List of moves

Fissure	Guillotine	Horn Drill	Sheer Cold
Ground	Normal	Normal	Ice
From Generation I	From Generation I	From Generation I	From Generation III

Trivia

• Due to the presence of these moves, Articuno has been used in many battles as it can also learn Mind Reader to make Sheer Cold sure to hit.
  • The same was true of a Poliwrath traded forward from Generation I that had learned Fissure, and could learn Mind Reader in Generation II.
    • Also, Smeargle is used in the same way due to its ability to learn any move via Sketch.
• Lapras can learn three of these moves: Sheer Cold, Fissure, and Horn Drill.
• Only Smeargle can learn all four of these moves via Sketch.
• Before Generation III introduced Sheer Cold, all of these moves could not affect specific Pokémon. Guillotine and Horn Drill could not affect Template:Type2 Pokémon, and Fissure could not affect Template:Type2 Pokémon.
  • Only Shedinja is immune to all four, thanks to its ability, Wonder Guard.

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.