From Bulbapedia, the community-driven Pokémon encyclopedia.
Pursuit (Japanese: おいうち Pursuing Attack) is a damage-dealing Dark-type move introduced in Generation II. This move has the highest possible priority value of all moves in Pokémon games.
Generations II and III
If the target Pokémon is switched out on the turn Pursuit is used, Pursuit's power becomes 80 and will deal damage before the Pokémon is switched out. This does not apply if used on an ally switching out, on a fleeing Pokémon, on a Pokémon using Teleport or Baton Pass, or on a Pokémon being forced to switch out.
In the case of the target Pokémon using U-turn, if Pursuit hits the target before it uses its move due to a higher speed, Pursuit will have 40 base power; otherwise it will be 80.
In the Japanese version of Pokémon Diamond and Pearl, when a Pokémon using a choice item uses Pursuit and the target Pokémon switches out, the Pokémon holding the item is allowed to change its move on the next turn. This glitch was fixed in localized versions and Platinum.
In Pokémon Platinum, and HeartGold and SoulSilver, this move can trigger the acid rain glitch by knocking out a target that was about to switch while Trick Room, Gravity, Uproar, or any type of weather other than rain is active.
In the case of the target Pokémon using Volt Switch, if Pursuit hits the target before it uses its move, Pursuit will have 40 base power; otherwise it will be 80.
|| A Dark-type attack. It inflicts major damage if the target switches out in the same turn.
|| Heavily strikes switching Pokémon.
|| Inflicts bad damage if used on a foe switching out.
|| An attack move that works especially well on a foe that is switching out.
|| Inflicts bad damage if used on a target switching out.
|| An attack move that inflicts double damage if used on a foe that is switching out of battle.
| An attack move that inflicts double damage if used on a target that is switching out of battle.
|| The power of this attack move is doubled if it's used on a target that's switching out of battle.
In other games
Unlike the core series games, Pursuit has an effect similar to Counter. The user sets Counter status, which damages enemies who use regular attacks or physical moves against the user.
|| The user gains the Counter status. Any damage from Physical Attack moves or a regular attack is partially returned.
In the manga
In the Pokémon Adventures manga
In other generations
In other languages