Well, I did this for Darkrai, soooo..
Hey, you heard it right. We all should know about the special regigigas event which in platinum unlocks the caves for Regirock, Regice, and Registeel, right? You should also know about the Shaymin event which unlocked Glacidia's flower in platinum, which is the only way to access Skymin, right? Well, you'll be pleased to hear this.
Both a Shaymin and Regigigas(at lv. 100! o.o)have been announced to be occuring at Toys R Us very soon! If you havn't been keeping track of Serebii, a Shaymin giveaway event is scheduled to inniciate at Toys R Us around the US in which you can transfer a free Shaymin to your Diamond or Pearl! The same goes with the special regigigas at a later date after the Shaymin event!
As I noted earlier, these pokes are special and activate otherwise inaccesible features in Platinum, once they are traded from your Diamond or Pearl, OVER to your Platinum. Now, onto the juicy details!
The Shaymin download will begin February 8th, which isn't very far off! The downloading will cease on the February 14th, which gives everyone a hearty six days to retrieve their legendary. The Regigigas event lasts even longer, starting March 8th, and ending all the way up to March 21st - right before Platinum's release. Aside from release dates of the events, here are the known details of the pokemon!
EDIT 2: Regigigas' information has also been confirmed!
Regigigas: Lv. 100 Holding a Custap Berry
ID No.: 03089
Note: This Regigigas has no Classic Ribbon oddly enough, meaning it can be traded on GTS.
EDIT: Shaymin's stats are now confirmed!
Shaymin: Lv. 50 Holds a Micle Berry
ID No.: 02089
Special Ribbon: Classic(no trading on GTS!)
Moveset(no exclusive moves, sorry) :
Also, never fret people without DP! I will gladly give anyone who doesn't own the games currently/couldn't make it an absolutely free clone of any event missed, whether it's a Darkrai or etc. Even if it's just a petty Dragonite from the last event, if you want it, come to me! Anyways, that's the event data. Begin discussion/commenting!