Why is sponge bob on nickelodeon not the Disney channel?

SpongeBob SquarePants is on Nickelodeon because it was created and produced by Nickelodeon.

Here's a breakdown:

* Nickelodeon is a cable channel owned by ViacomCBS. They have their own in-house production studios and have created many original shows, including SpongeBob SquarePants.

* Disney Channel is owned by The Walt Disney Company. They also produce their own shows and are known for their family-friendly programming.

So, while both channels show cartoons, they have different ownership and production models. Nickelodeon owns the rights to SpongeBob SquarePants, so it airs on their channel.