Among the most vocal of his counterparts are the quick - tempered Mr. Potato Head (Don Rickles), the fidgety green dinosaur Rex (Wallace Shawn), stretchy Slinky Dog (Jim Varney, of «Ernest» film fame), observant piggy bank Hamm (John Ratzenberger, who has
since become Pixar's «good
luck charm»), semi-romantic interest porcelain lamp doll Bo Peep (Annie Potts), and the commanding plastic army figure Sarge (R. Lee Ermey, of drill sergeant role fame).