South Park (1997)

S17E4 Goth Kids 3: Dawn of the Posers

After one of the Goth kids is sent to a camp for troubled youth, her return leaves her friends shocked by her unsettling transformation. Feeling that their identity is at risk, the Goths realize they need to take urgent action. In a surprising turn of events, they reach out to the Vamp kids for assistance, hoping their unconventional allies can help restore their friend to her former self.