I've seen a break of the fourth wall, but not quite in the same context as it is in your own situation. My own experience was with Star tropics 2, I forget exactly how the fourth wall was broken, I think it had something to do with the character turning to you and mentioning things that happened in the last game. It was enough to make me feel the whole game was lame. Which is a shame because the first one was so good. If I remember the details I'll edit them in here.