GBA Adapter!?

[Tika]

Is there any way to hook up with someone via the internet (IP address?)

I know this is possible in SNES for two player games, but is it possible in GBA?
And if not, why?

[Jale]

VBALink. Unofficial VisualBoyAdvance with link feature.

[Jay]

I think I did a thread on this a long time ago with screenshots.