How do you get into the Regis caves?

I'll assume you have a Relicanth and Wailord on your team. From Pacifidlog Town, head west on Route 132 and keep as far south as you can along the current. Carry on through Routes 132 and 133. When you hit the sandbar that forms the border between Route 133 and Route 134, go straight across and follow the current to a diving area. Go down and continue to a white mound with an inscription on the south side. Position yourself right in front of this inscription and ascend, and you should be in the Sealed Chamber.

Now head to the inscription in the back of the chamber and use Dig in front of it to gouge a hole. Go through the hole and continue to the inscription at back, rearrange your party so that Wailord is in leader position and Relicanth is in the lowest of the five secondary slots in your team, and examine the inscription. This will open the caves holding Regirock, Regice, and Registeel.

You must have a wailord at the front of your party and a relicanth at the end, you then travel to pacifilog and surf to the small patch of dark water and dive under follow the underwater path until you come to some braille face the braille and use dive you should be in a cave, go to the back of the cave and use dig a door should open go through the door to the back and read the braille on the back wall