SpongeBob SquarePants Season 1 Episode 21 F.U.N. ( Air Date 1999-09-18 ) Genre Animation, Comedy, Family category. Overview "SpongeBob thinks that Plankton is evil only because he is lonely and has no friends. SpongeBob becomes Plankton's friend and plays with him. But, Mr. Krabs is convinced that Plankton is evil and that SpongeBob should not be hanging around with him.".
SpongeBob SquarePants Season 1 Episode 21 F.U.N.
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- Watch: SpongeBob SquarePants Season 1 Episode 21 F.U.N. on CWR-CRB
- Stars: Tom Kenny, Bill Fagerbakke, Rodger Bumpass, Clancy Brown, Carolyn Lawrence, Mary Jo Catlett, Mr. Lawrence
- Director: Mr. Lawrence, Andrew Huebner, Niels Lindelien, Frank Weiss, Mike Dougherty, Maria Gonzalez, David J. Steinberg, Cathy Galeota, William Gonzalez, Angelique Yen, Glenn Oyabe, Brandon Hoang, Mark Taylor, Brown Johnson, Rich Magallanes, Dina Buteyn, Jason Stiff
