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Pokémon Communication Centre
Location: Goldenrod City
Method:
The Pokémon Communication Centre starts off as seeming like an ordinary Pokémon Centre, but as you activate the Mobile Adapter, the centre opens up. In it, you will find a special Trade Corner, which allows you to trade with various people wirelessly across Japan. This acted in a similar way to the Global Trade Station allowing you to put Pokémon you want up and Pokémon you have up for trade. This cost 10¥ per trade
It also included the Pokémon News Network, which gave various updates about the game, progress in your local areas, as well as details on special downloads. This required a service charge of 100 Yen a month
You can also trade and battle with your friends upstairs online in the Pokémon Communication Center