You can't find it. It is an item that you can only get from special Nintendo DS events, unless your friend trades you a Pokemon that is holding Oak's Letter.
its an event item for shaymin.. it ended November 8th
You get it over mystery gift.
No, you'll need the Action Replay now to get it.
yu have to get to the end of rute 224 and have oaks letter
You can get oaks letter over wifi mystery gift for platinum from September 28 to November 8. Unfortunantly the event is ending tomorrow. You should go by a Nintendo wifi USB.
what you do is get shaymin with oaks letter cheat then go to floroma city and talkto a girl outside , she will give you garceida flower (or whatever its called).
you use a action replay and use it to get oaks letter
Event or cheat
go to a Nintendo event.
u need oaks letter that's where shaymin is get oaks letter.
No. The Shaymin event (oaks letter) in Pokemon platinum is not shareable. ~Bellafuzz
oaks letter
You get it over mystery gift.
No. You can only get it by mystery gift.
only with a event
take it to the rock up there by the Pokemon league
You can only get it by using the Action Replay currently. The event for Oak's Letter has expired.
You can obtain it only through a official Nintendo event.