I am designing a steel only team for my platinum version and I am almost complete, I just need an aggron and a metagross and I do not have a 3rd gen game to migrate up to. I know I must use the poke radar but I have tried and can not seem to encounter one. I also do not know where to find aron, but I know beldum Is on the desert route to the north. I also have a magnezone with magnet pull so it will be easy to encounter either one once I know how to. Thanks so much.