When the Pokémon enters a battle, it identifies opponents' held items.
Frisk (Japanese: おみとおしUnobstructed Sight) is an Ability introduced in Generation IV.
Effect
In battle
Generations IV and V
Frisk allows the Pokémon to see the opponent's held item upon entering battle. If the foe is holding an item, a message identifying the item will be shown right after the Pokémon with Frisk enters the battle. If the foe is not holding an item, no message will appear.
In a Double or Triple Battle, an unidentified opponent is randomly chosen and its held item revealed. The item revealed may be from a non-adjacent opponent.
Generation VI
Frisk now identifies the held items of all opposing Pokémon, regardless of position, in the order of left to right from that team's perspective.
When the Pokémon uses a move on a foe, it will learn the name of the item the foe is holding.* When it uses a move or attack on a foe, the Pokémon will know the name of the item that foe is carrying.*