First of all the name is not global link but it is Global Trade Station and you can find it in the 3rd city in the game which is Goldenrod city and you can find it at the left of the city.
You cannot get Victini in the Pokémon Global Link.
Pokemon global link is free but you do need a copy of the pokemon black version or white version, and also a DSI. That will cost some money but I think that It's worth it. You can get berries and items and pokemon (too bad they are all lv.10) and send them into your game. You will also need a pokemon trainer club account and the C-Gear. Click on the Game Sync button in the online section. The Pokemon global link is out now!
Aura Beam is in Pokemon HeartGold.
That is impossible in Pokemon HeartGold and SoulSilver.
You can do pokemon global trade in The counter at the top left corner of all pokemon Centers
Yes, Pokemon Global Link is active.
No, the Pokewalker accessory is only for Pokemon Heartgold and Soulsilver versions. Though you can use the Global Link for similar in-game purposes.
Yes there is a Global Trade Station in Pokémon HeartGold and SoulSilver. It is located in GoldenRod City in the west.
I put a link to a guide all about legendary pokemon in HeartGold in the related links.
The Global Terminal in Goldenrod city.
You cannot get Victini in the Pokémon Global Link.
on the global trading station there's like a million
See related link for a list of the Pokemon and details about them.
link trade from heartgold
You can use the Global Trade Center in Goldenrod city.
link trade from diamond pearl or platinum
You have to trade for manphy or phione on the global trade network