From Bulbapedia, the community-driven Pokémon encyclopedia.
Covet (Japanese: ほしがる Covet) is a damage-dealing Template:Type2 move introduced in Generation III.
Covet inflicts damage and steals the target's held item if it is holding any. If the target is not holding an item or the user is already holding an item, Covet only inflicts damage and will not be able to steal an item. Held mail cannot be stolen. The item cannot be stolen if the target has the Sticky Hold Ability.
The player's Pokémon's held item would not be stolen if Covet is used by a wild Pokémon.
Covet can steal a non-player character's Pokémon's items permanently.
Same as Generation III. Additionally, all stolen held items will be returned to the player if the opponent manages to steal an item by using Thief or Covet.
Items cannot be stolen from Pokémon with the Ability Multitype, and the Griseous Orb cannot be stolen. If the target's consumable held item is triggered by Covet, such as a Chilan Berry or Focus Sash, it will not be stolen.
The power of Covet increased from 40 to 60. Covet no longer steals a Trainer's Pokémon's items permanently; however, a wild Pokémon's item is still permanently stolen by the player. Covet will now succeed with a Griseous Orb as long as neither the user nor the target is Giratina.
In other languages