Hidden Abilities

Hidden Abilities were first introduced back in Pokemon Black and White through the Dream World and later through Breeding. In the Seventh Generation, Hidden Abilities still exist for almost every Pokemon. Pokemon that can breed can still transfer Hidden Abilities to their offspring, especially so if they themselves have that Hidden Ability. But there is also a New way to obtaining Hidden Abilities on certain Pokemon.

In the Seventh Generation, Pokemon that appear as in S.O.S. Battle Chains each have a small chance of having their Hidden Ability as the chain progresses. And that includes all S.O.S Pokemon across the entire Alola Region. That's hundreds of possible Pokemon to obtain with their Hidden Ability! Though not the best technique there has ever been for Hidden Abilities, it certainly works!