The big clean-up

It is the day before the Fall Formal when the beautifully decorated gym erupts in a mysterious slime explosion. Rainbow Dash, although innocent, is sentenced to clean up the mess, while the Fall Formal is being postponed, much to the chagrin of the other students.
Twilight offers her help to the distressed Rainbow Dash. As they start cleaning the gym, they also have to face the angry reactions of the other students together. But Twilight has a secret agenda that Rainbow must not learn about.
Set in an alternate Equestria Girls universe where the events from the movie have not happened.