After the events at the Temple of Sinnoh, you begin your search for Origin Ore.
Go to Primeval Grotto
Fly down from Summit Camp to Primeval Grotto. Its entrance is in the side of the mountain. Approach the guidance marker.
You will battle Charm's level 61 Rhydon and level 62 Gengar.
Your pokémon will be healed up afterward.
Talk to the Professor
Use the map to travel instantly to Summit Camp, and talk to Professor Laventon. Afterward, you obtain an Origin Ball.
Put the Legendary Pokémon in your Party
Put the legendary pokémon from the Temple of Sinnoh into your party. Then approach the Front Gate of Jubilife Village.
Afterward, talk to Ress at the Front Gate and go to Summit Camp in Coronet Highlands. Make your way up to Stone Portal, enter the cave and go up the slope. After the cutscene, go up the next slope and go outside. Then go up to the temple.
Legendary Pokémon Battle
Circles of energy will appear beneath you. You need to dodge out of these quickly, before they explode. Stay out of the pink energy circles that they leave behind. After a few of these, the legendary pokémon will send rings of energy outward from itself. Dodge over them.
Later, meteors will fall from above, and will land on the circles that appear on the floor, so watch carefully to dodge away from them. Stay away from the pink energy circles that they leave behind. The legendary pokémon will once again send rings of energy outward from itself. Dodge over them.
If the boss begins to charge up energy, with orbs floating above its head, throw balms at it quickly until the orbs disappear, while dodging the energy circles that appear beneath you. After the pokémon is stunned, you can battle the pokémon. Afterward, throw balms as quickly as you can.
Continue using these strategies until you are victorious. Congratulations! You won!
A New Day Dawns
Watch all the cutscenes that follow. Afterward, save the game and go outside. Go into Galaxy Hall and approach Cyllene. The next mission, The Researcher of Myths, will begin.