1. Regice
* Location: Snowpoint Temple, located at the top of Snowpoint City.
* Requirements: You need to have the National Dex unlocked.
* To Access: You must have defeated the Elite Four and become the Pokemon League Champion. You'll then need to talk to the temple's elder.
* Catching: Regice will appear inside the temple. Use a strong Ice-type Pokemon (like Glaceon) to lower its attack. If you have the right Pokemon, you should be able to catch it without it fainting.
2. Regirock
* Location: The entrance to the Valley Windworks, located north of Oreburgh City.
* Requirements: You need to have the National Dex unlocked.
* To Access: First, you'll need to enter the Valley Windworks and beat the puzzle inside (pushing boulders). Then, talk to the old man outside the entrance. He'll give you a "Regirock Key" and then leave. Enter the windworks again, and use the Regirock Key to unlock the door to where Regirock is.
* Catching: Regirock will be waiting. You can use fighting and grass type moves, or a strong Pokemon like Rhyperior.
3. Registeel
* Location: The Iron Island, located south of Veilstone City.
* Requirements: You need to have the National Dex unlocked.
* To Access: You'll need to complete the Iron Island puzzle. You need to push blocks, and you'll face a battle with the Gym Leader, Byron. Then, talk to the old man on the island.
* Catching: Registeel will be waiting for you in the center of the island. Fighting or fire type moves are useful.
Important Tips
* Level: All three Regis have high level, so be sure to bring strong Pokemon.
* Status Conditions: Use status conditions like sleep, paralysis, or freeze to make it easier to catch them.
* Ultra Balls: Ultra Balls are recommended for capturing the Regis.
* Pokemon with False Swipe: A Pokemon with False Swipe will bring the Regis down to low health without knocking it out.
* Save: Be sure to save before attempting to catch them, just in case you fail.
Have fun catching these legendary Pokemon!