Big Pecksin Pokémon Polished Crystal

Big Pecks is an ability in Polished Crystal that prevents the user's Defense stat from being lowered by opposing Pokémon's moves or abilities. This ability is only found as a hidden ability on two bird Pokémon, Pidgey, Pidgeotto. Pidgot does not have this ability and has No Guard as a hidden ability instead. This ability is supressed by Mold Breaker, which ignore abilities that would prevent stat changes!