How do you get kyreum in pokemon black?

Answer 1

I recommend you use dusk balls to catch it, they are your best chance on doing so.

On Route 13, go to the Giant Chasm. To get there, you must go down to the beach and head north off of the very eastern edge on ground level. After finding a clearing, you can make easy access by using Strength to push a rock into a hole on the bottom left corner, which can be accessible later from the split road by going right and to the upper right corner.

After completing these things, head into the cave, where you can first go up and around to collect all the items located on the far side. You will need Strength to get them.

When you're finished making your way around, head down the stairs to the exit in the middle. You'll find yourself in a foresty area.

At first, you'll think that there is no way up into Kyurem's resting place, but actually, there is. Walk up to the northernmost part and go right. Trees block your every path, though, so walk all the way to where the trees end. Even then, you still cant get in, so you want to start going left near the bottom. Don't jump of the ledge that takes you back to the beginning, though, and instead go up between some trees. Once you get there, head to a rough estimation of what is the middle of the map, which you can go to by heading right somewhere in that area.

You'll find yourself in a clearing with a hole in the middle. approach it, and you'll hear Kyurem's screech. A snowstorm will begin to occur, so that everything is covered in snow, including the trees previously blocking your path.

Head up the stairs now, and into the cave. Kyurem will be waiting there, so get close to it and begin your battle.

Good luck!!!

Source: My experience and various YouTube videos, for more details.