Desert Ruins

Desert Ruins is a location in Hoenn. It is on Route 111 and has two chambers. In the innermost chamber, you fight Regirock at Level 40; it will have the moveset Rock Throw, Curse, Superpower, and Ancientpower.

To get to Regirock, you must first open the ruins by completing the Braille puzzle on Route 134. This is done by surfing there, diving in the correct place, then travelling to a braille inscription. After reading it, use Dive again to surface in a cave. Go to the north of the room, and use Dig after reading another inscription, and the wall will collapse.

Head into the next chamber and read the inscription at the north wall. Then, put a Relicanth first in your party, and a Wailord last (for Ruby/Sapphire) and read the inscription again. there will be an earthquake, and you should hear the sound of three doors opening far away.

In Emerald, the order is reversed, you put Wailord first in your party, and Relicanth last.

Go back to the Desert Ruins, and the door should be open. Enter the chamber and read the braille inscription on the north wall, then (for Ruby/Sapphire) take two steps right, and two steps down, then use Strength. The wall will collapse and you can go through and cacth Regirock.

For Emerald, you go two steps left, two steps down, then use Strength to open the chamber.