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You would need to have 2 DS systems handy for this.

You would set both up, go to the top of the Pokemon Center in both, enter the Union Room (middle counter) and walk the trainers up to each other, hit the "TRADE" option, and then trade your Pokemon Diamond Pokemon for your Platinum Pokemon. Just use Pokemon that you'll never use if you want to keep your Platinum Pokemon too.

Hope this helps :)

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13y ago

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