South park imagionnation land?

what is the south park imagination land trilogy based on?

its not really based off of anything they just have characters that everyone knows.

kyle needs to suck cartmans balls cuz cartman proved that leprechan are real.

Unfortunately, I don't know. I checked wikipedia and I didn't find much...Keep an eye out on wikipedia though. Alot of the episode include a "cultural references" that says what inspired the episode. Nothing on imaginationland yet other than it was originally planned to be a full length movie but it's unknown why it was aired on tv and not made into a movie. Check there every so often because information is added every so often.

Episode 1- When the entire contents of the world's imagination lay open before them, Stan and Kyle step right in. Back in South Park, Cartman swears he's seen a leprechaun.
Stan and Kyle are being held in the bowels of the Pentagon until they tell the government how they got into Imaginationland. Meanwhile, Cartman simply won't rest until he finds Kyle and gets him to make good on their bet to suck his balls.
Inside Imaginationland, Stan and Butters engage in the battle of their lives as they fight the army of evil imaginary forces. Meanwhile, Cartman goes all the way to the Supreme Court to get Kyle to suck his balls.