How do you get Regiice Regirock and Registeel in Pokemon?

Answer 1

REGIROCK

Fly to the Route 111 Sandstorm. On the way, you can drop off Relicanth and Wailord and switch them for your regular Pokemon catching team. Also ensure that you have someone who can use Rock Smash. Head into the Sandstorm and work your way to the southern end where you'll see a cave opening. Read the Braille message and take two steps down, then two steps left. Use Rock Smash and the entrance will open. Step through and you'll find yourself face to face with a lv40 Regirock.

REGICE

Fly to Dewford Town and head north onto Route 105. Stay close to the west edge of the route and you'll see a Ruin Maniac running up and down the coast of an island. Cross the island and continue west then north to reach the Island Cave. Read the Braille message and then make a full lap around the edges of the cave in a clockwise direction (that is, head right and go around the cave, sticking to the wall at all times). The entrance will open and you'll find yourself face to face with a lv40 Regice.

REGISTEEL

Fly to either Fortree or Lilycove City. Ensure you have someone who can use Flash. Make your way to Route 120's Ancient Tomb, which is quite near to a log bridge over water. The weather is usually stormy around the Ancient Tomb as well, if you would like that as a guide to its location. Enter the cave and read the Braille message. Position yourself in the center of the tomb by standing four steps directly above the door. Use Flash, and the entrance to the rear will open, where you'll find a lv40 Registeel.