SpongeBob Squarepants history can be traced back to 1993 when Rocko's Modern Life first aired. One of the producers was Stephen Hillenburg, a cartoon worker/marine biologist who loved both his careers. When Rocko's Modern Life was cancelled in 1996, Hillenburg began working on SpongeBob Squarepants (although some sketches trace back to 1986). He teamed up with creative director Derek Drymon, who had worked on shows such as Doug, Action League Now!, and Hey Arnold!. Drymon had worked with Hillenburg on Rocko's Modern Life as well, as did many SpongeBob Squarepants crew members, including writer Tim Hill and voice actors Tom Kenny and Doug Lawrence. Another crew member with previous Nickelodeon cartoon experience was former Angry Beavers story editor Merriwether Williams, who worked on that show for its first few seasons and switched to SpongeBob Squarepants in July 1999. During production of the show, Hillenburg provided a concept of short comics with the same style of the show, but the characters looked different. SpongeBob Squarepants used to be named SpongeBoy, and used to wear a red hat with a green base and a white business shirt with a tie. The name "SpongeBoy" did not make it into the show since the name was already officially trademarked by Bob Burden, creator of Flaming Carrot. Hillenburg later chose the alternative name "SpongeBob." The original name was once referenced in the show by Mr. Krabs' line, "SpongeBoy, me Bob!." The Krusty Krab was originally spelled with the letter C rather than K, but Stephen Hillenburg thought K's were funnier.
Rise to popularity (1999–2000)
On May 1, 1999, SpongeBob Squarepants aired its first episode, "Help Wanted/Reef Blower/Tea at the Treedome", after the 1999 Nickelodeon Kids' Choice Awards. At this time, Rugrats was at the height of its popularity and had already outlived dozens of other lower-budget cartoons. SpongeBob Squarepants , with its generally lower-class animation and humor style more rooted in clever word-play and culture-references unlike the potty humor that made Rugrats so popular, was expected to be just another one of those shows. Following early struggles, its ratings soared, and a year after release, it surpassed Rugrats as Nickelodeon's highest rated show. SpongeBob's signature voice (provided by Tom Kenny) and humorous style was enjoyable to both younger and older audiences.
The show began its second season in 2000 with more high-quality animation and even more popular episodes. By then it was clear to the world that SpongeBob Squarepants had opened the door to many other cartoons to use more "adult" senses of humor and come from smaller companies. In 2001, The Fairly OddParents aired from the then-small Frederator company. It focused on a sense of humor similar to SpongeBob’s, only more realistic, slightly crazier (and more suggestive to "adult" topics), and with more pop culture references; this show managed to become a hit as well and currently ranks behind SpongeBob Squarepants as Nick's second most popular show. That same year, Invader Zim aired, created by comic book writer Jhonen Vasquez; it had a dark but silly sense of humor (similar to Vasquez's other comic books) that managed to attract a very loyal cult following consisting more of teens and adults than young children (though also containing a moderate amount of preteens). SpongeBob Squarepants, however, was the leader of all these shows and had by this time started its now famous merchandise line.
2002 also saw a bright side, as the first part of that year saw SpongeBob Squarepants at its peak. The beginning of the third season produced many classic episodes and focused on the same style and animation concepts. The year also saw another low-budget show with popularity (The Adventures of Jimmy Neutron: Boy Genius), but things changed late in the year. Due to rumors of a movie, there was high speculation that the show would be cancelled and that 2003/2004 would feature the last season of new episodes. Fans were devastated and online petitions were widely distributed to convince Nickelodeon to produce more episodes by showing continuing fan support. SpongeBob Squarepants Meets The Strangler/Pranks A Lot" was the last episode of this season, and aired in October of 2004. Following this, the movie was released in November of that year.