http://www.youtube.com/watch?v=wdTSvoRAgp8 Only works in Clockwork Knight Fukubukuro (Japan-only compilation). Code is up up down down left right left right L R L R on the mode select screen, then start a game on Part 2. Credit goes to Yakumo of Assembler for digging it up (apparently?) and Tongara for immediately telling me about it. From what I gather, it was only published once in some magazine. This is pretty fucking big!