[PAR] [TLE] Mermaid Man and Barnacle Boy [SEP] 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". [PAR] [TLE] SpongeBob SquarePants (season 1) [SEP] 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.
[PAR] [TLE] Mermaid Man and Barnacle Boy [ SEP ] 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 " . [PAR] [TLE] SpongeBob SquarePants ( season 1 ) [ SEP ] 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 .
In which year, did this earliest guest star in 1999 for SpongeBob SquarePants stop providing the voice?
In which year , did this earliest guest star in 1999 for SpongeBob SquarePants stop providing the voice ?
2012
2012