It's Braille: Buy the Ruby and Sapphire Strategy Guide: About $13.95 at most book stores.

Fly to pacifidlog town. You should arrive at the Pokemon Center. Go two steps down and go to the logs at the right. Surf for 12 steps left, 8 steps south, and 7 steps left. The current then should get you and you should battle this guy. Win. Then, take 4 steps south, 7 steps left, and surf. The current should take you to another island. Go straight left until you reach the water, and surf. The current should bring you to open water. Take 6 steps left and surf yet again. You should land on an island. Go 4 steps north, 6 steps left, 3 steps south, 7 steps left, 3 steps south, three steps left, one step north, and one step left, and surf. The current should take you to another island. Go straight left across the island and surf again. You should reach deep water. Now, dive. Go two steps south and into the entranceway. Go 25 steps south, 3 steps right, 11 steps south, 3 steps left, 6 steps south, 5 steps right, and press B. Okay, go to the back with the big braille writing. Teach one of your pokemon dig and use it. Onto the next stage. Again, go to the back. Put Relicanth at the beginning of your party, and Wailord as the last pokemon in your party. Go to the rock at the end, and press A. That's it. You then have to go find caves and get Regirock, Registeel, and RegiIce. REGIROCK Go into the desert, and go way south, until you reach a cave. Go straight Forward. The braille says... RIGHT RIGHT DOWN DOWN THEN USE STRENGTH Do so, and the wall opens. Go straight forward and encounter REGIROCKlv40! CATCH HIM! Use water moves until he's very low in health. It also helps if you make him fall asleep. Then leave. SAVE BEFORE THE BATTLE!!!!!!!!!! REGIICE Fly to Dewford. Go to granite cave, go north of it, and surf north, until you reach two islands with trees on them. Go to the islands, and surf north, until you reach a cave. Go to the braille. It says... STOP AND WAIT WAIT FOR TIME TO PASS TWICE Erm, just stare at the rock (with the braille still up) for two minutes. Go to the pokemon and FIGHT!!!!!!!! Use the same strategy as before. Time for the last Regi. SAVE BEFORE THE BATTLE!!!!!!!!!! REGISTEEL Okay, fly to Fortree City. Then, go east and follow Route 120. After you cross a bridge made of logs, go as far south as possible. When you see stairs, climb them. Go north from the stairs, cut through the grass, climb another set of stairs, and enter the cavern. Go to the braille. It says... WITH NEW TIME HOPE AND LOVE AIM TO THE SKY IN THE MIDDLE Take four steps down and use the HM fly. The door should now open. Go in and face Registeel. He is very hard to catch. Weaken him as much as possible and then put him to sleep. Throw some Ultra Balls at him and catch him (You'll have to use a lot of ultra balls). That's it for Sealed Cavern. SAVE BEFORE THE BATTLE!!!!!!!!!! http://db.gamefaqs.com/portable/gbadvance/file/pokemon_rs_n.txt

After you open the doors to the Regi's, you must do to regice first! Fly to Doford town and go all the way up to the water. the surf left until your to the rocks. then surf up till you come to a small island with trees and a guy on it. go to the left of the island and surf until you rach a cave surrounded by rocks(all regi's caves are surrounded by 6 rocks). Enter then read the Brille. it says "Stop and wait" after reading it stay in that spot for about 2 minutes, and walla, the door to regice is open. Save, it will take a while to catch. buy like 50 ultra balls. Next come Registeel. go to the safari entrence and keep goin toward the weather institute.

Braile. When you enter the cave, walk to the top center of the room and use Dig to break through. In the next room make sure you have a Relicanth in the first spot of your party and a Wailord in the last. Walk to the top of the room and read the center script. It will trigger an earthquake. That will unlock the three Regi. You will find their caves on Rt. 120, in the southern part of the desert, and on Rt. 105. Here are the translations of the braile you will find at each location. Rt. 120 THOSE WHO INHERIT OUR WILL SHINE IN THE MIDDLE (use FLASH in the center of the room) Desert LEFT, LEFT DOWN, DOWN THEN USE ROCK SMASH (start from inscription) Rt. 105 STAY CLOSE TO THE WALL, RUN AROUND ONE LAP. (harder than it sounds, but exactly what it says) I hope this helps, it took a long time to figure all that out. If you have Pokemon Emerald, these work for it as well

it is braille and leads you to the regis put rilicanth in front of party and wailord in back use dig at the end of both sections of caves then go to their temples