Copper

Copper (おまわりさんA, Policeman A / もんばんさんA, Gatekeeper B) is a dog who appears in all the games along with his working partner, Booker. In all three games, Copper's dedication to professionalism and his work is in sharp contrast with Booker's doddering incompetence. Copper also prides early risers and warns the player to be careful when wandering around at night. Copper cannot tell you about the lost and found, but he can tell you and type in friend codes with him. You can only visit other people's towns by using WiiConnect24 or Nintendo WFC.

Copper displays extreme dedication to his job, sacrificing his own desires in order to fulfill his duties.

Animal Forest and Animal Crossing
In, Copper works at the Police Station where he alerts the player of upcoming events, the location of visitors in the town, hosts morning workout regimes in the summer and gives your friends a map of the town. Copper marks the player's attendance to morning exercises, and a reward is given if the player participates for a certain number of days.

Animal Crossing: Wild World and Animal Crossing: City Folk
In Wild World and City Folk, Copper has the same job, opening or closing the Town Gate for the player's friends to come through and play. Copper will explain everything you need to know about visiting or inviting a friend. He is on the right side of the Town Gate. On the left is Booker. Copper will give you your friend code, so you can exchange it with your friend's. Copper is much more brave and daring than his partner, Booker, and mocks Booker in his shyness. He also helps with the DS Suitcase.

Super Smash Bros. Brawl
In Super Smash Bros. Brawl, Copper can sometimes be seen in the background of the Smashville stage. Copper also appears as a trophy and a sticker in this game as part of the Animal Crossing series. The trophy has him and Booker standing on it and reads:

"The guards stationed at the town gate through which travelers come and go. Copper, who's on the right, is in charge of traveling via Nintendo WFC, and Booker on the left runs the lost and found. Booker's a cute fellow who's known for his indecisive manner...maybe. Copper's diligent, dedicated, and always ready to lend a helping paw."

Trivia

 * Copper can be seen sleeping on the job at night in Animal Crossing
 * Copper's name comes from the slang term for police officer, "copper."