This is a building in the heart of Magma City, where you can trade pokemon. A mixture of the union room and Sinnoh's GTS, you may trade in person with other Tynri trainers, put a pokemon up for trade and wait for an offer, or set up a specific trade with trainers in different regions. Trades may be as unbalanced as you want; a pikachu for 5 lucarios, or a free skitty... doesn't matter.

(If you set up an offer with trainers overseas, I will either pretend some random guy in kanto took the offer, or, with consent of the owner of the site involved, I will allow inter-site trading)

You cannot enter the GTS until you have your first Gym Badge. After that you may return whenever you'd like.