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Increases the accuracy of all moves used by this Pokémon by 30%. This is a multiplicative increase, not additive, meaning if a move has 50% accuracy before Compoundeyes, it is brought to 65% total accuracy afterward.
When a Pokémon with this ability is first in the party, wild Pokémon will have a higher chance of holding an item. This effect only applies to items that the Pokémon can be found holding regardless.