In which year, did this earliest guest star in 1999 for SpongeBob SquarePants stop providing the voice?
Mermaid Man and Barnacle Boy Mermaid Man and Barnacle Boy are fictional superheroes in the Nickelodeon animated television series "SpongeBob SquarePants". Mermaid Man was voiced by Ernest Borgnine from 1999 to his death in 2012, and Barnacle Boy is voiced by Tim Conway. Mermaid Man and Barnacle Boy were created and designed by Stephen Hillenburg. The characters debuted on August 21, 1999 in the series' episode "Mermaid Man and Barnacle Boy".
SpongeBob's Atlantis SquarePantis SpongeBob's Atlantis SquarePantis is a 2007 made-for-television musical comedy special directed by Andrew Overtoom. It stars Tom Kenny, Bill Fagerbakke, Rodger Bumpass, Clancy Brown, Carolyn Lawrence, and Mr. Lawrence. "Atlantis SquarePantis" originally aired on Nickelodeon in the United States on November 12, 2007, following a 12-hour-marathon of "SpongeBob SquarePants" episodes. In the film, SpongeBob (voiced by Kenny) and Patrick (voiced by Fagerbakke) discover a half of an ancient medallion that helps them & their friends get to the lost city of Atlantis.