* The battle against AZ and his Floccesy Ranch Pokemon. This is the main event in the Chamber of Emptiness. You encounter AZ, a man who fought in the ancient war 3,000 years ago, and his Floccesy Ranch Pokemon. This battle is crucial to the main storyline of Pokemon Y.
Beyond the battle, there isn't much else to do in the Chamber of Emptiness:
* No other trainers to battle: It's a relatively empty location designed for the story event.
* No items to find: The Chamber itself doesn't contain any hidden items or secrets.
* No Pokemon to catch: There are no wild Pokemon to catch in this area.
Therefore, the main activity in the Chamber of Emptiness is defeating AZ and his Floccesy Ranch Pokemon.