in heart gold/soul silver, if you go to a certain place with an arceus in your party, you get sent to the sinjoh ruins. from there, you may pick between aa palkia, a dialga, or a giratina. these are each level 1, and holding their orbs. you can get 2 of these, by using separate arceus. (Hall of Origin and TRU).
while that's on my mind, if someone requests a giratina, keep in mind that since in diamond and pearl the griseous orb CANNOT exist due to the code having not been incuded at the time, there may be some problems.
also, i'd like to request hall of origins arceus so i can get a second level 1 legendary dragon.