Kim Possible (2002)

S2E19 Go Team Go

While visiting Go City, Ron and Kim encounter the villainous Aviarius, who is on a quest to harness the abilities of another hero. When Kim accidentally gains the powers of Hego, she realizes that the only way to revert the situation and thwart Aviarius's plans is to join forces with her greatest adversary, Shego. Uniting with her nemesis proves to be a challenging yet necessary alliance as they work together to confront the looming threat.