Who knows ithe the Wii version of Punch-Out!
will have some secret laying dormant for 20+ years but Makato Wada, who was part of the dev team, has let loose on one
. Fighting Bald Bull, there's a light that flashes right of him in the audience when he charges. If you punch during that flash you'll land a body blow. It's certainly not some huge secret but it's fun to learn these little facts nevertheless. I wonder if there are anymore.