regiice

Regice can be found on route 105. In the cave their will be a brail on the north wall to open up this door to regice you must run around the caves perimeter. But before the cave will become available you must have found the sealed chamber and brake the seal. If this hasn't been done the instructions on doing so are below. First to unlock the chance to catch all three of the regi's you will need the following things.
1. A wailord in your lead position and a relicanth in your last position
2. You will need a Pokemon that knows dive and a Pokemon that knows dig

Next you have to find the sealed chamber. It is on route 134 their is a small place where you can dive. When you find it dive and continue down until you see a wall that has visual brail on the south side use dive when you are infront of the brail. This will lead you into the sealed chamber. There will be 9 or 10 walls in here these walls are just the alphabet. On the north wall is another message. Use dig right infront of the brail. It will take you into another room. Once there you will see another message in brail on the north wall this will say to put wailord in the first and relicanth in the last but you have already done that so the ground will shake and open up three new caves all over the region. Hope this helps

The legendary Regice if found on Route 105 in the water. Then in the inside of the cave you have to be in front of the strange lenguaje and press the A button and then do not do anything and let the dots in the screen and wait like 3 minuts and the second Room of the Island Cave and there will be Regice.

Hope it helps!