Jiminy Cricket's voice was created by singer Cliff Edwards, who voiced it for Disney through the 1960s.
After Pinocchio he appeared in Fun and Fancy Free as the host of the cartoon segments. He also appeared in a lot of Disney TV Specials as the host. Jiminy most recently appeared on House of Mouse, along with many other Disney characters.
Jiminy Cricket has become a major icon at The Walt Disney Company alongside Mickey Mouse and Tinkerbell.