<Li> John Ratzenberger - (1995--present) </Li> <Li> Andrew Stanton - Buzz Lightyear of Star Command: The Adventure Begins </Li> <P> Hamm is a wisecracking realist piggy bank with a cork in his belly in place of a stopper . He and Mr. Potato Head appear to be best friends, and are often seen playing games, such as Battleship (with Hamm always winning). Out of all the toys, he is shown to have the most knowledge of the outside, often being very familiar with various gadgets that are shown, likely as an homage to Ratzenberger's famous role of mail carrier and bar know - it - all Cliff Clavin on the sitcom Cheers . </P> <P> In Toy Story, Hamm interrupts Woody's staff meeting by alerting the crowd telling them that the birthday guests are arriving at 3: 00 . Hamm becomes fascinated with Buzz's features and ridicules of Woody, along with Potato Head . When Woody inadvertently knocks Buzz off the window, Hamm is one of the many toys who believes that Woody did it intentionally and he turns on him . However, Hamm realizes the truth that Buzz is alive . At the end, Hamm cheers for Potato Head when Molly gets a Mrs. Potato Head for Christmas . </P>

Who does the voices of toy story characters