How do you get regice registeel regirock on emerald

Go to the Sealed Chamber with a Pokemon that knows Dig. Then, walk to the back of the chamber, where the braille is, and use Dig. A door should appear. Walk through it, and keep walking to the next braille. Press A, and an Earthquake should be triggered, opening the regi-sites.

Be aware-

• You will need a Relicanth in the back of your party
• And a Wailord in the front of you party
• Your Pokemon will need to know; Surf, Dive and Dig.