Here are the pictures & names of all the characters available in Animal Crossing: Wild World. Characters that visit or live in all villages will have their names in Blue. Hold your mouse over a character to see their catchphrase.

Agent S to Copper

Agent S Alfonso Alice Alli Amelia Anabelle Anchovy Angus Antonio Apollo Aurora Baabara Bella Benedict Big Top Bill Biskit Blaire Blanca Blathers Bluebear Bob Bones Booker Boone Bree Brewster Buck Bud Bunnie Butch Camofrog Caroline* Celeste Cesar Chevre Chief Chow Coco Copper *Yes, this is the islander Bliss from Animal Crossing (GCN). She appears to be renamed "Caroline" in AC:WW, although she retains her catchphrase.