Here are Star Wars references found in SouthPark
Pink Eye (1997) - Edited to contain only the SW references.
Kyle: No way dude. I'm gonna win the costume contest with this sweet Chewbacca costume.
Kyle: Just wait till everyone sees my sweet Chewbacca costume. They're gonna be so jealous.
The entire class has a Chewbacca mask on.
Stan: Woah dude!
Kyle: Everyone came as Chewbacca?!?
Mr. Garrison is dressed as Marilyn Monroe, Mr. Hat has a Chewbacca mask on.
Mr. Garrison: It sure does seem to be a popular costume this year Kyle.
Mr. Hat: Roar.
Wendy: I thought you would reach the same conclusion, so, I came as Chewbacca.
Cartman: You're just jealous. Why don't you go back to Endor you stupid Wookiee?
Kyle: Wookiees don't live on Endor!
Cartman: (In a mocking voice) Wookiees don't live on Endor.
Mr. Garrison: Ok now, all you little Chewbaccas take your seats.
Mr. Garrison: And the award for the very best costume goes to...Wendy, for her Chewbacca costume!
Trey Paker in TV Guide 3/28-4/3: “In a very special episode you’ll see Kenny’s face. It’ll be like Darth Vader in ‘The Empire Strikes Back.’”
In the Episode Clubhouses, 1999.
Cartman wants to build a treehouse that's better than Stan and Kyle's. He pulls
out blueprints for them entitled, Ewok Village 2000.
Halloween (1999) - Wendy wins the costume contest with her Cewbacca mask, same as the original Halloween episode. Kenny is inside an ED-209 (Robocop) costume he built and at the end little Snowspeeders tie cable around his legs, trip him and blow him up like in ESB.