Hello everyone.
If you want to catch Regigigas in Pokemon White and Black 2 first get Regirock then if you have White 2 get the iceburg key after catching Regirock
in Black 2 get Regirock and then you will get an iron key.
Then link trade keys with an opposite game of yours using the Univa Link.
Then go to Twist Mountain and go to the lowest level with Regirock, Registeel and Regice. Go in to the room where you can evolve Eevies in to Glaceons there will be a whole in the wall. You need your Pokemons to have the Strength move to push the boulders out of the way then you will find Regigigas. The best balls to catch Regigigas are Masterballs, Nest Balls, Quick Balls and Dusk Balls.
You do not need a key to find Regigigas. To catch Registeel and Regice you just have to change the key stadium in the Univa Link. To catch Regirock you need to go from the circle in front of the gate and take six steps going down from where you entered and then go 9 steps right then press A then you will see a lever and press it down using A. Then the circle will light up. Go in to the gate to the otherside of the ruin and you will see Regirock.
Have a great day and keep on catching Pokemons!
