Sealed Chamber

The Sealed Chamber is located on Route 134, between Pacifidlog and Slateport Towns.It opens the doors to the Regis caves.

FIRST GET A WAILORD, RELICANTH, AND A POKEMON THAT KNOWS DIG. You have to maneuver your way through the currents of Route 134 to find a square-shaped patch of Dive-able spot. Dive down and follow the path to a rock with Braille. Read it and a door will open.Follow through it and surface. Now put Relicanth in the front of your party and Wailord in the back(or maybe the other way around).

Go to the back of the room. Read the middle text on the far wall. Then use Dig. You should hear a rumbling, which means the doors to the Regis are open.