I think that Spongebob is a lot like Rocko's Modern Life (probably because the same guy produced both shows). Spongebob is like Rocko, Gary is like Spunky the Dog, Patrick is like Heffer, Squidward can be like Filbert or Mr. Bighead (I'm not sure), and Mr. Krabs is like Mr. Bighead. I'm really not sure who Sandy's like, though. Maybe Sandy is like Filbert, Squidward is like Mr. Bighead, and Mr. Krabs is like that yellow character on Rocko that picked his nose all the time.