I used to have the USB, but it doesn't matter, I would want parallel port as well since I have an extra Win 98 computer with that feature!!! The thing is, not only I have the Flash2Advance card but I also have a GB Bridge, so without the linker those two items won't work!!
I tried the Trading Section from Gbatemp but here what they gave me:
"Only regular members may use this forum. A regular member is a member having posted at least 100 messages on our forums, excluding the messages posted in our "testing area". Any attempt to raise your post count in order to have access this section will be reprehended. Users that have a warning level strictly above 10% will not have access to the trading forums either. "