Swaps abilities with the foe.
Skill Swap is a Psychic-type status move that allows the user to exchange its Ability with that of the target. In Polished Crystal, Skill Swap can be learned by various Psychic-type Pokémon, providing them with a strategic option to alter battle dynamics by swapping Abilities with opponents or allies.
This is a Move Tutor move. TThe location page may have more information on how to obtain it.