at mistys gym after you battle the team rocket grunt look in between tubes or in tubes [Not Sure] there is a piece that says power plant piece then go to the power plant and give it to the guy.
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not sure...
fix the power plant
Find the machine part in the cerulean city gym give that to the guy.
After you fix the power plant go back to the kanto radio station and the owner will give you the card.
i would say soulsliver becase on soulsliver you can fly and black you cacth water pokemon but on sliver you can get fire pokemon