Yesterday at the Pac Man 35th anniversary Billy Mitchell triggered a second key on Pac Man's split screen (the moment captured and uploaded to YouTube by Triforce Johnson).
Billy was playing on a modified ROM that starts the game on the 255th board.
Any Pac players out there want to explain how this was achieved, and why it wouldn't work on a "real" perfect run on TG settings? Or is a perfect score now 3,338,360?
We may have gotten to the bottom of this while discussing it in the Donkey Kong Forum shoutbox a few minutes ago, but here's the video so that you can judge for yourself:
Meanwhile, here's Billy showing Iwatani himself some fancy pass-throughs:
https://www.youtube.com/watch?v=5jDA5dq7GuI