No, you can trade with no badges at all.
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You can't trade badges in any Pokemon games. You have to earn them from the Gym leader.
It is not available in Pokemon Crystal. You will need to trade for it from Pokemon Red, Blue, or Yellow.
my but
in order for trader Pokemon to listen to you. you need gym badges if you have al 8 badges they will obey and if you have 3 or four badges is going to e hard to train Pokemon
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