Time to take on two bosses in the Galactic HQ! The first is your rematch with Cyrus, and he's gotten quite a bit stronger from the last time you fought him. Then, after getting the Master Ball from him, you need to go save the three Pokemon of the lakes and you'll have to fight Saturn to do so! After that, it's time to head to the top of Mt. Coronet, so make sure you fully stock up your inventory with Hyper Potions, Full Restores, Dusk Balls, Full Heals, Revives, and Max Repels before heading up there!