Lightning Dust returns as the leader of the Washouts. Plus, she is not alone. Seeing Scootaloo idolizing them, Rainbow Dash fears that she would no longer appreciate the Wonderbolts and do something that would endanger her. However, Autobot Sideswipe intervenes to stop Lightning and a Decepticon foe from fulfilling their evil plan. He will not back down until whatever the Decepticon is planning is foiled.

Note: This takes place after Transformers: Dark of the Moon and during the events of MLP:FIM season 8 episode 20: The Washouts.