20% Sweetier

When Sweetie Belle magically derails one of Twilight’s experiments, she finds that she and Rainbow Dash have switched bodies. While Twilight works on a way to remedy the situation, Rainbow and Sweetie try to live each other’s lives as if nothing has happened.

Which might have worked out, if the weather team hadn’t needed Rainbow’s help. Or if Diamond Tiara hadn’t decided to pick on Scootaloo.