Evangeline_A.K._McDowell said: Those are the episode numbers that the corresponding characters/outfits are in.
Like the wendy with the bloody hands and shooting star shirt. that episode number is the same episode she whiped Cartman into a bloody pulp. Epic fight scene I might add for a 1vs1 with no weapons or Mutated celebrity villans.
Pip - Two Guys Naked in a Hot Tub - The apron is when he used it to follow Stan's bidding.
Craig and Tweek - South Park Is Gay! - When metro sexuality hits the town, the guys begin to dress up like one.
Kyle - Butt Out! - After a lame performing group try to encourage kids not to smoke, the kids take smoking to avoid becoming like one of them.
Stan - The Losing Edge - The baseball outfit that the kids wear when they grudgingly forced to play in the baseball tournament.
Butters - Marjorine - Butters' crossdressing appearance he wore to sneak in the girls' slumber party.
Kenny - Most of early episodes - His appearance when he pretty much died.
Cartman - Imaginationland - Cartman's outfit when he went to find Kyle.
Clyde - The List - Clyde's appearance after finding out that his the number one on the girls' cuteness list. The shoe represent how his dad owns the local shoe store.
Wendy - Breast Cancer Show Ever - Wendy's appearance after she beat the crap out of cartman.
Pip - Two Guys Naked in a Hot Tub - The apron is when he used it to follow Stan's bidding.
Craig and Tweek - South Park Is Gay! - When metro sexuality hits the town, the guys begin to dress up like one.
Kyle - Butt Out! - After a lame performing group try to encourage kids not to smoke, the kids take smoking to avoid becoming like one of them.
Stan - The Losing Edge - The baseball outfit that the kids wear when they grudgingly forced to play in the baseball tournament.
Butters - Marjorine - Butters' crossdressing appearance he wore to sneak in the girls' slumber party.
Kenny - Most of early episodes - His appearance when he pretty much died.
Cartman - Imaginationland - Cartman's outfit when he went to find Kyle.
Clyde - The List - Clyde's appearance after finding out that his the number one on the girls' cuteness list. The shoe represent how his dad owns the local shoe store.
Wendy - Breast Cancer Show Ever - Wendy's appearance after she beat the crap out of cartman.