How do you catch Regirock Regice and Registeel?

Answer 1

You can catch all three with ultra balls. Some may say that doesn't work but I've done it and caught them all with only 5 ultra balls each. Just to be safe though, I'd buy 10 for each. Hope this helped!

Answer 2

ok you have to have relicanth and wailord. now that you have these 2 you have to go pacifidlog town and go to the ocean currents. however before you go in make shure you have a Pokemon that knows dig. ok now enter the ocean current and stay near the bottom of the current. when you get to the spot to dive do it and you have to follow the path and read the braille it will say go up. in the sealed cavern you will have to go to the back wall and it will say dig here and it will open. next put wailord up first and relicanth last and read the tablet at the back of the room. press"A" (if you don't have any luck with this switch them and press "B") and there'll be an earthquake. a message will appear saying that a door opened somewhere. the 3 regis are released.Regirock

fly to fallarbor town, and go east into the dessert where you found the fossils, their you should find a large rock with an entrance. go in their and go to the middle it will have braille on it so go left, left and down, down then use strength. a door will appear. go inside to get regirock.

Regice

go to petalburg city and surf west. keep on surfing until you reach a small island.go west and keep surfing up. you'll then find yourself on an island with a small mountain. go inside, stand in the middle of the braille wall and press"A". walk around the room in a clock wise motion staying against the wall the whole time. then hold still for 2 minutes and the door will open walk in and you will be fighting regice.

Registeel

have a mach bike and a Pokemon with flash. go west of the safari zone until you reach a mound of earth. using the mach bike go up and it will start to rain. you'll find a cave go in and press"A" against the braille slate. go to the middle of the cave and use flash.then you will get to catch registeel