SpongeBob SquarePants
It first aired in May, 1999. The comic was created by an artist, animator, and former marine biologist Stephen Hillenburg. The show's main characters are SpongeBob SquarePants, Squidward Tentacles, Mr. Krabs, Patrick Star, Karen, Sandy Cheeks, and Plankton. This was the highest-rated Nickelodeon show.