I've seen Mario Bros and Donkey Kong control panels for six button layout and love them but am still debating. My daughter also loves DK Jr. and Punchout and I was wondering if anyone has done a six button version of these. I may end up only installing four buttons. This is for a 2 player bartop from scratch btw.
Edit: Looks like I've got it narrowed down to a Mario Bros arcade style theme or Bubble Bobble.