I received this question in a comment and I have never played City Folk, and was wondering if you could answer it for me:
i was playing animal crossing city folks and i have found two empty gold lamps. i hear there is a ghost that comes and said he lost his lamp but i can never seem to find him. do you have any advice on what to do with them. thanks
This is funny since I just did the same the other night!
Okay, when you find a lamp, you can find Wisp the SAME NIGHT that you found the lamp. It will not work any other night. After 8:00 PM, just wander around your whole town (he never comes up anywhere specific) until you start to hear whispers about coming to a certain direction. Follow the directions he gives until you find him.
Give him the lamp, then go to your attic and rub the lamp, and choose a gift!