Talk to Vidar on floor 3 of the Statera HQ
79, 77, 334
Go to the Kyurem shrine in Northrun
-32, 55, -752
Climb to the top
Once you've arrived at the top, follow the path into the shrine
Eventually you will reach the maze, there are 3 mazes in total
If you want a video guide I will link one, if not, then just try to follow the instructions
Maze Video: https://www.youtube.com/watch?v=suiCvThE-QU
For this first maze I would advise hugging the right wall
You should make it to a staircase like this for the path out
This next maze you only have 1 minute to complete, so you gotta be fast, my advice is to hug the right wall again
For the last maze, it's an illusion, you might think you're at a dead end but the path can still open up, my advice is to hug the left wall
About the halfway mark you'll reach a room that looks like this, if you don't see it, then you're not going the right way
After completing the last maze, pickup Kyurems pokeball
-321, 50, -750
Sophro beat you to it, follow the path out to exit
As you approach the crowd of trainers and Pokémon a cutscene should activate, once the cutscene is over protect Vidar from the surrounding Pokémon
Horde of Pokémon:
Battle Astrid
Astrid: (Random Order)
Battle Danielle
Danielle: (Random Order)
Defeat the Swords of Justice + Kyurem
You will then recieve a Legendary depending on your team
Go to the Statera HQ in Watterson for a cutscene
65, 54, 325
Professor Hemlock will proceed to call you on the pokegear, meet him at his lab in Findale Harbor (/spawn)
637, 49, 445