turn the game off stick the ds then the gba in the slot, turn on game go to Pokemon platinum on the menu BEFORE you start playing and it will be some where in the menu it says migrate from Emerald. click then say yes to everything. I'll tell you the rules
1. You have to have at least six Pokemon in PC
2. you can only choose six Pokemon
3. you can only do it once a day
4.get at pal park
pal park is the place where Pro. Rowen's lab is when you go at the very south, use surf soon you'll be at a island go to the big place with a pokeball on the fount go to the counter and you can do the rest.
DO AFTER beating Pokemon lueage (sorry for spelling)
X24
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You have to migrate it from Sapphire or Emerald.
u have to migrate them from ruby Sapphire emerald
its migrate and yes but only if you have a national dex
Im sorry you can't duplicate Pokemon in Pokemon platinum. You can duplicate Pokemon in diamond/Pearl or emerald the trade or migrate them to platinum though.
u cant u have to migrate it from either Pokemon sapphire ruby or emerald