Cartman, seeking revenge on Kyle, calls an anonymous tip to ICE, leading to the Broflovski family's arrest. While detained, Kyle warns agents that their cruel treatment of immigrant children could create a vengeful "Mexican Joker"—a mythological figure the agents begin to fear is real.

Randy Marsh, Kyle Broflovski, Eric Cartman, and Towelie.

The "Mexican Joker" concept serves as a direct jab at the dark, gritty origin stories prevalent in media, specifically mocking the anticipation for Todd Phillips' Joker .