Rayquaza

With the Jade Orb in your cube, enter Crystal Peak and follow the path forward.

Descend from the ladder at the end of the path to continue forward.

On this floor, use Surf to follow the path east before taking the first turn north.

Ensure all three color switches are enabled.

With that done, go back to the water and climb the east ladder.

Use Rock Climb to scale the wall down before going west.

Use the yellow crystals at the end here to scale the wall up, then follow the path south.

You’ll see more yellow crystals to your east going downward. Use Rock Climb on them and continue south.

Take the exit you see to your south.

Once outside, scale the wall going up using the colored crystals.

When you get the choice to climb the blue or red crystals, use Rock Climb on the blue crystals on your right-hand side.

Continue climbing until you can enter the mountain again.

Descend from the platform you’re on using the red crystals to your east.

From there, go up a bit and take the first turn west & follow that path.

Climb the ladder at the end of the path.

Now, follow the linear path forward.

Climb the ladder at the end of the path.

Go east toward the pushable boulders.

Use Strength to solve the quick puzzle and continue on the path. See the screenshot below for the puzzle solution.

Climb the ladder at the end of the path.

And finally, here you can take the south exit leading to the mountain’s top.

Once outside, climb the stairs to your east and continue north.

Go to the very northernmost part of the mountain and the Jade Orb will start glowing.

The orb will summon Rayquaza who’ll challenge you to a battle.