No, you cannot. Pokemon Diamond and Pearl are in Sinnoh only.
You cant go to kanto in the sinnoh Pokemon games.
First you have to defeat the pokemon league and go to Kanto. In Kanto you have to go to Oak's lab and he will offer you one of the three starter pokemon for Kanto.
No but in Pokemon crystal you can go from johto to kanto to johto etc.!!!
I believe that you can get to Kanto after defeating the Pokemon league and getting the National Pokedex.
no you can't go to kanto or any other regions!
I am sorry but no.
Yes.
Yes you do.
i think you need to go to mt:cornet and look on the roof of the building
yes you can go to kanto in heart gold and soul silvers.
In Pokemon Platinum you can't go to any other (that includes Kanto) region. I know it's upsetting, but you can still have fun by catching uncommon Pokemon!
You can't go to Hoenn in Pokemon HeartGold. You can only go to Kanto.