Nickelodeon's megahit show SpongeBob SquarePants made its TV debut on May 1, 1999. Fans of the cartoon span generations and the animated series has become a multibillion-dollar franchise.

UPDATE Dec. 13: SpongeBob SquarePants Presents The Tidal Zone, the first ever SpongeBob Universe crossover, which had been originally slated for November, will now premiere Jan. 13 with encores on ...

Nickelodeon's megahit show SpongeBob SquarePants made its TV debut on May 1, 1999. Fans of the cartoon span generations and the animated series has become a multibillion-dollar franchise.