Catch or breed the Pokémon in games where Hidden Abilities exist
Use Ability Patches if the game supports them
Use Ability Capsules only if the Hidden Ability is already available as a normal ability in that game
Breed from a parent with the Hidden Ability when inheritance is supported
Obtain Hidden Ability Pokémon from raids, events, or special distributions
Trade for a Pokémon that already has its Hidden Ability
Use Safari, DexNav, SOS, Horde, or similar encounter methods in games that feature Hidden Ability chances
Check game-specific methods, since availability varies by title