That's So Raven - Season 3 Episode 15 -

Raven accidentally hits Bianca in the face during a game of dodgeball. Surprisingly, it makes her a nice person, leading everyone to think Raven is the toughest girl in school. She abuses her newfound power, and takes over Bianca's old posse, but soon regrets it. The only cure, though, hits Bianca in the chest with another dodge ball. Meanwhile, Larry spends time with Victor which makes Cory jealous.