 Kenny provides the voices of SpongeBob SquarePants, his pet snail Gary, the French Narrator, Harold SquarePants, Patchy the Pirate, and the Dirty Bubble. Kenny previously worked with Hillenburg on Rocko's Modern Life and, when Hillenburg created SpongeBob SquarePants, he approached Kenny to voice the character. The voice of SpongeBob was originally used by Kenny for a minor background character in Rocko's Modern Life. Kenny says that SpongeBob's high-pitched laugh was specifically created to be unique. They wanted an annoying laugh in the tradition of Popeye and Woody Woodpecker.
