Ultra Beasts On Poni Island

Walkthrough: After becoming the first Alola Region Champion and the credits roll, the Post Game will begin. This starts with the Ultra Recon Squad needing the help of both your player and Hau. Apparently, some Ultra Beasts have been discovered in Poni Grove on Poni Island, coming through the Ultra Wormholes some time ago. Now helping the Aether Foundation discover more about these Ultra Beast, they enlist the help of the two strongest trainers in The Alola Region.

As you reach Poni Grove, you will be told by the Ultra Recon Squad that there are three Ultra Beasts in the area. They will further ask you to try to capture these Pokemon, even though battling them will be enough for their research as well. After battling/catching two of the three Blacephalon (each at Level 60), the four of you will depart as Hau will be nice enough to give the Blacephalon he caught to the Ultra Recon Squad. You can come back later to obtain the final one; however, for now, the Team Rainbow Rocket Episode begins.