Groove Squad

Groove Squad is a 2002 animated film which debuted as a part of Nickelodeon Sunday Movie Toons in late 2002. The titular squad consists of three high school cheerleaders (and best friends) who end up gaining superpowers (and ultimately use their new powers to become superheroines) after being accidentally zapped by a jolt of electricity from a deranged mad scientist. With help from their team mascot and their hairstylist (who's a former Mi6-agent), the three cheerleaders learn to use their newfound powers (and hide their newfound identities) and defeat the power-hungry mad scientist while also struggling to win the annual cheerleading competition.