Well after you unlock the doors to the chamber, via the Sealed Chamber in Route 134. You have to decipher braille and enter the sealed chamber with a wailord in your first position and a relicanth in last position. It is recommended to weaken Regice and then put it to sleep. Then you can use ultra balls, or if the battle takes a while, you can use timer balls. go to gamecc.com and search Pokemon ruby and you will find it
You can only catch it in Ruby, Sapphire or Emerald and migrate it over. If you get an event Regigigas on Pokemon Platinum you can catch Regice there.
Regirock, and finally Registeel.
The legendaries you can catch in Pokemon Ruby without trading or going to an event are Groundon, Rayquaza, Latios, Regice, Regirock, and Registeel.
Latios, groudon, Rayquaza, Regice, regirock, registeel, they are the legendaries you catch int he game without cheating or trading
The only way to get Regice on pokemon diamond is to transfer them from Ruby, Emerald, or Sapphire.
you can not get regigigas! but you can catch regice, regirock, registel.
migrate it from ruby/sapphire.
you cant get regice in pearl you haft to migrate him from sappire ruby or emerald
there is not regice in pearl. but if you have ruby, emerald, or sapphire you could trade regice,regirock, and registeel to get rigigious.
you catch one
sorry, you can't catch them, you have to migrate them from the GBA game Sapphire/Rubymigrate
Transfer from Ruby, Sapphire, or Emerald.