SpongeBob SquarePants is the main character and protagonist of the Nickelodeon animated series of the same name. He is voiced by Tom Kenny and first appeared on television in the series' pilot episode "Help Wanted" on May 1, 1999. SpongeBob was created and designed by cartoonist Stephen Hillenburg, shortly after the cancellation of Rocko's Modern Life in 1996.
SpongeBob is an excitable sponge who is best friends with Patrick, a rather dumb pink starfish. The two annoy Squidward Tentacles without really knowing it.
The only official information to SpongeBob's pre-adult life is that he was born in 1986.
Much of SpongeBob's early education is unknown; however, it was mentioned that his kindergarten teacher was Mrs. Shell. Also, he encountered a fellow Elementary classmate named Dennis in "The Sponge Who Could Fly." He also mentioned that he was voted most clumsy in High School, and was never able to get a date for his Junior Prom.
SpongeBob is currently in Boating School. He has never passed the test, which annoys his teacher, Mrs. Puff, greatly.
SpongeBob expressed his desire to work at the Krusty Krab. To Squidward's distaste, he applied to Mr. Krabs, the owner, for a job as a fry cook. Spongebob, being an excellent fry cook himself, wanted to master the art of creating a Krabby Patty. Mr. Krabs hired him, but first wanted to see how capable he was. He sent him to buy a hydro-dynamic spatula with port and starboard attachments, (which would be seen occasionally in later episodes). To Mr. Krabs' shock, SpongeBob returned with said spatula in the nick of time (the Krusty Krab had been invaded by anchovies). SpongeBob fed all of them with Krabby Patties, and Mr. Krabs was extremely pleased. Spongebob was hired soon after.
SpongeBob is a yellow sponge with olive green holes, he resembles a kitchen sponge, he wears brown pants, white polo shirt, red necktie, white lanky socks that reach his knees and with red and blue stripes and black shoes. He also blue colored eyes, red cheeks and a pink chin.
He frequently gets days off at the Krusty Krab Restaurant, and as a result he spends his free time with his best friend Patrick Star, and especially enjoys practicing karate with his other friend Sandy Cheeks. He also likes eating jelly, and collecting the jellyfish at Jellyfish Fields. To date, he has caught, named, and let go every jellyfish in Jellyfish Fields at least once, except the blue jellyfish, until the end of the episode "Jellyfish Hunter". He also likes to blow bubbles, surf, sun bathe, and play the ukulele. His favorite TV show is The New Adventures of Mermaid Man and Barnacle Boy. SpongeBob is such a fan of the show that he and Patrick together brought them out of retirement. They also pretend to be Mermaid Man and Barnacle Boy.
- Patrick Star- SpongeBob has been best friends with Patrick for as long as he can remember. Even though Patrick is dim-witted, SpongeBob looks at him as a genius. Patrick lives under a rock two houses away from SpongeBob. The pair love jellyfishing, bubble-blowing, and playing childish games. However, neither one notices the fact that they are incredibly naive, and both are optimists.
- Squidward Tentacles- SpongeBob is always under the impression that Squidward and he are great friends, but Squidward thinks otherwise. He has even stated to SpongeBob (directly) that he hates him, but SpongeBob never takes him seriously. He and Patrick also love to play with him, but always end up making "every 11 minutes of his life" (which is how long a episode segment is) filled with misery.
- Mr. Krabs- Mr. Krabs is SpongeBob's boss and fatherly figure, carrying with him tales of the sea and warnings. Occasionally, SpongeBob has gotten in trouble with him, but Mr. Krabs is proud of him nevertheless.
- Sandy Cheeks- Sandy is another one of his friends, and loves to practice Karate with him as well as hang out in Goo Lagoon. She often looks at him as immature, but laughs at his brand of humor. In "Truth or Square", SpongeBob revealed that they once starred in a play with each other, pretending to marry each other.
- Plankton- Plankton and SpongeBob are enemies and SpongeBob usually defeats his plans for world domination. In some episodes SpongeBob has tried to help Plankton, but Plankton always takes advantage of SpongeBob and tricks him into doing his dirty work for him.