Random Episodes
The List
In this episode, the girls in the fourth grade class make a secret list that rates every boy's looks from cutest to ugliest. When the boys steal the list they are unprepared to deal with the results. 
Hell on Earth 2006
Satan is throwing the biggest Halloween costume party ever, and no one will be admitted without a wristband. Satan is busy checking the R.S.V.P. list and deciding what costume to wear to the big event... 
Red Sleigh Down
Once again, it's Christmas time in South Park. When all the tallies are in, Cartman is over drawn in the "naughty" column. He has to score one big "nice" to be eligible for Christmas presents this yea... Search Episodes
If you're looking for an episode but cant remember which season it's in but can remember part of the title use this.
Short searches like "cartman" usually yield best results.
