Sponge Bob’s 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 (although some sketches trace back to 1996). 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 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 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 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.
from : directsource-games.com