Regirock is at the bitten if the desert on route 111. You need to have already opened the outside door by going to the cave after pacifidlog town. Take a relincanth and a wailord. Put the relincanth first and the wailord last in your party. Go in, using dig, then go to the back room and talk to the center of the wall that has Braille. Go to regirocks cave when it is open, then go in. Walk to the Braille at the top of the cave. Read it, then take two steps left and two steps down. Then use rock smash. If you do exactly that, a door will open where the Braille was. Walk in and regirock will be there.
how do i get regirock
to get regirock in Pokemon platinum, you have to upload it from ruby, Sapphire, or emerald.
You'll have to trade Regirock from Ruby, Sapphire, or Emerald.You get a regeirock by trading it from ruby sapphire or emerald. that's how you get it to fire red.
In Diamond you can't catch Regirock, you have to migrate it from Pokemon Ruby, Sapphire, or Emerald.
You cannot get Regirock in Diamond without migrating one from Ruby, Sapphire or Emerald.
i don't think you can
no
Regice: Route 105 Regirock: Route 111 Registeel: Route 119
go to the sealed camber by having wailord and recaith
Wherever you found then in Ruby or Sapphire. :)
Trade for them
Kyogre, Regice, Registeel, and Regirock.