You can SEE one but its a traner battle
And that battle is when you battle the CHAMPION CYNTHIA IN THE ELITE FOUR
well when you pass the elite four...
you can't
In the Pokemon Diamond and Pearl games, Spiritomb can be obtained either through the quest in which the player must have 32 interactions with friends, or through the Global Trade Station. If Spiritomb has been encountered by the player, such as through battling the Elite Four and then the Champion, then it can be requested in the GTS system for trade.
Dialga
You can get a Cyndaquil without trading only by transfering it from a GBA Pokemon Game onto your Pokemon Diamond Version.
no
no
trade with friends that also have a ds or buy action replay from a local game stop.
i have Pokemon diamond, and played 600 hours. its not possible. but you can catch a ditto, and make Pokemon eggs.
you cant get it without migrating.
you do need cheats
trade with Pokemon Platinum
Rival