Cat

From Animal Crossing - Wiki on Neoseeker

The cat is a non-villager and villager species that has appeared in every game of the series.

Trivia

Some of the cats were introduced in Animal Forest only to come back at a way later time to make an appearance in Animal Crossing: City Folk.
Bob may have been one of the first villagers that the game creators ever made.

Villager Species

Name	Games	Birthday	Picture Inscription
Ankha	Animal Crossing Animal Crossing: City Folk	September 22nd	N/A
Bob	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	January 1st	"I'm a cat. Chillin' is in my blood, man."
Felicity	Animal Crossing: City Folk	March 30th	N/A
Kabuki	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	November 29th	"Hoo-ha konichiwa!"
Kid Cat	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	January 1st	"Spandex is the best disguise."
Kiki	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	October 8th	"Hang in there, kiddo."
Kitty	Animal Crossing Animal Crossing: City Folk	February 15th	N/A
Lolly	Animal Crossing: City Folk	March 27th	N/A
Merry	Animal Crossing: City Folk	June 29th	N/A
Mitzi	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	September 25th	"Sometimes I think I'm the only sane one around."
Moe	Animal Crossing: Wild World Animal Crossing: City Folk	January 12th	"Whoa..."
Monique	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	Spetember 30th	"No airbrushing necessary!"
Olivia	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	February 3rd	"You're the best kind of friend because you make me look even prettier."
Punchy	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	April 9th	"Turn the other cheek."
Purrl	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	May 29th	"You don't mind if I sharpen my claws on your bed, do you?"
Rosie	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	February 27th	"To the president of the Rosie Fan club!"
Stinky	Animal Crossing Animal Crossing: City Folk	August 17th	N/A
Tabby	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	August 13th	"This is my new headshot!"
Tangy	Animal Crossing Animal Crossing: Wild World Animal Crossing: City Folk	June 17th	"They say cats hate citrus. THAT REALLY HURTS MY FEELINGS!"
Tom	Animal Crossing Animal Crossing: City Folk	December 10th	N/A