This is a pretty big necro bump, but I just remember vgchartz has a friend voucher thread for Metroid Prime Trilogy and I got a whole bunch of friend vouchers to trade with anyone in the US. I think I got around 15-17 to share with anyone, so if anyone is interested PM me or just quote me in this thread. My wii code should be on my profile, but I'll post it here as well.
5053-3427-0412-6953