you need oak's letter and then you have to go to route 224 in pok'mon diamond, or pearl. I am not sure about poke'mon platinum
You cannot catch shaymin on platinum without cheats unless u get the event xcard from toys r us
giritena or if wifi arcerice shamin
in yhece3vbggd21ecgy6
You can't.
No, you cannot.
its impossible without cheats
in a fossil
No, not without cheats. You can only catch Zekrom. -Kevin Seamus
I think you can catch 6 The Pokemon you can catch without cheats are: Palkia Girantina Cresselia Uxie Azelf Mesprit Heatran Rotom I forget the rest, but I know there's more!
its impossible without gameshark or action replay.
No it is not possible.
You don't.