the central sci-fi/horror/fantasy club I'm in (University sponsored) even asked for people to bring GBA's and Four Swords if they owned it (GBA version) when it was released for GBA a few years back so during the Friday events at the student center on campus people could get together and finish it.
Good time with it, too bad the GBA-SP wasn't as popular and I didn't have mine then, so it was a little hard to see at times, but it was still an awesome experience...
Enough people should own GBA's that are the kind of people you'd be looking to play Four Swords with (Nintendo/Zelda fans, with A Link to the past and the Oracle games on the system, and now Zelda NES-edition).