In which year, did this earliest guest star in 1999 for SpongeBob SquarePants stop providing the voice?
SpongeBob SquarePants (season 1) The first season of the American animated television sitcom "SpongeBob SquarePants", created by former marine biologist and animator Stephen Hillenburg, aired from May 1, 1999 to April 8, 2000, and consists of 20 episodes. The series chronicles the exploits and adventures of the title character and his various friends in the fictional underwater city of Bikini Bottom. The show features the voices of Tom Kenny, Bill Fagerbakke, Rodger Bumpass, Clancy Brown, Mr. Lawrence, Jill Talley, Carolyn Lawrence, Mary Jo Catlett, and Lori Alan. Among the first guest stars to appear on the show were Ernest Borgnine and Tim Conway voicing the superhero characters of Mermaid Man and Barnacle Boy, respectively.
Muppet Babies Jim Henson's Muppet Babies, commonly known by the shortened title Muppet Babies, is an American animated television series that aired from September 15, 1984 to November 2, 1991 on CBS. The show portrays childhood versions of the Muppets living together in a nursery under the care of a human woman called Nanny. Nanny appears in almost every episode, but her face is never visible, only the babies' view of her pink skirt, purple sweater, and distinctive green and white striped socks is shown. The idea of presenting the Muppets as children first appeared in a dream sequence in "The Muppets Take Manhattan" (1984), released two months before "Muppet Babies" debuted, in which Miss Piggy imagined what it would be like if she and Kermit the Frog had grown up together.