if you have Pokemon FireRed,leafgreen,emerald or ruby in you GBA slot with suciune in the game go to pal park go inside this grassy runny thingy and run around the field and you'l have your suicune migrated to Pokemon diamond
If your Starter is a Charmander, then Suicune will be roaming around the Kanto region just like Cresselia in Pearl and Diamond.
After Suicune there is Regirock. You can find it at Sekra Range.
You have to trade or migrate. You can't catch them in diamond.
The Shiny Suicune was a game stop event held before Pokemon black and whiter where releases. You had to get either suicune riakou or entei at the event of your Pokemon Pearl/diamond/platinum/soul silver/ or heart gold version, and then transfer them to your Pokemon black/white version.
Migrate or cheat are the only ways.
no
You can't obtain suicune in Pokemon Diamond. You have to migrate it from your Pokemon Firered or Leafgreen. To find suicune in either Firered or Leafgreen you must have the National Dex, and you should have chosen charmander as your starter. Suicune will appear anywhere (except for caves) in Kanto - similar to catching Latias/Latios in Pokemon Ruby and Sapphire.
ride around the lake with your water pokemon that has swim move. there should be cave with suicune somewhere.
at olivine city
On Cerulean Cape
go to snowpoint city and talk to the gym leader and she will give you a suicune but you have to catch 151 Pokemon to do it. it is very simple i have done it many times
To get them, transfer them from Pokemon Fire Red and Leaf Green.