When is the first opportunity to trade in Pokemon Black 2 with two DS's?

Question

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Answer 1

You can trade if only if you have obtained the C-Gear from Bianca in Aspretia City, Which happens early in the game.

Source : Personal Experience

Comments

Oh sorry! I meant with two DS's mine and my sisters! Sorry I wasn't clear enough!

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mistakes can happen.No problem

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Thanks for new answer!

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You're welcome as always ;)