Animal Crossing Wild World

The site with the best information for animal crossing has to go to the Animal Crossing Community.

There are a lot of sites out there, and be warned that not all of it is entirely accurate. Some of the info in the guides on IGN is partially inaccurate, so be a bit careful about it. Unfortunately there isn't a really excellent dedicated site for Animal Crossing Wild World. The Animal Crossing Community does all of the various iterations of Animal Crossing, including Animal Crossing Citifolk.

The really nice thing is that they have a database of items which makes it fairly easy to figure out what you need in order to complete themes and sets, which makes it very nice.

As far as walkthroughs and so forth, however, I would recommend that you stop over at IGN where there are a variety of different options available. But once again all of the information there isn't 100%, particularly information regarding items.