I used an ActionReplay to unlock some mad test areas in Wind Waker. In one of them, there is like every character lined up, and in another there are lots of random enemies. And the whole place is different colored uneven tiles, with numbers and letters on them. You might have seen screen-shots before, but its really bazaar :o
I've heard about the same thing in many, many other games, zelda and otherwise. They always have characters lined up and such, and I think that talking to them allows different options to be played around with.