After watching almost all spongebob episodes I'll have to say that my paborito was when patrick and spongebob took sandy's rocket and flew to the moon and instead of landing on the moon they came back to earth. They thought that aliens really exist and they were trying to trick them into thinking they were back to earth. So they captured every "alien" in bikini bottom....
Well if you haven't seen this episode and you want to see it go on to google video and type, spongebob takes sandy's rocket. I don't want to spoil the whole episode for you.

SpongeBob SquarePants(born July 14, 1986) is the eponymous character of the Nickelodeon animated comedy SpongeBob SquarePants. He was designed sa pamamagitan ng marine biologist and animator Stephen Hillenburg, and is voiced sa pamamagitan ng Tom Kenny. SpongeBob is a childish, dim-witted and eccentric sea sponge who lives in a pineapple in the underwater city of Bikini Bottom. He works as a fry cook at the Krusty Krab, a job which he is exceptionally skilled at. SpongeBob is very immature and is a constant annoyance to those around him, but he is very good natured