To relate to Starlight, Rainbow Dash tells the story of how her cousin stopped playing with her after receiving a Cutie-Mark with the opposite purpose to her own: A Stormcloud. The CMCs decide to go on a mission in Cloudsdale to find Rainbow's cousin and help her with her cutie mark.

However when Starlight offers to transfigure all the CMCs into Pegasi with grown wings to help them with their mission, Scootaloo misuses them.