Twilight needed to work on that counter spell. The fate of the whole world depended on it. So yea, she had to stay up all night if that's what it took. She went for a snack, but Pinkie Pie really didn't have that much of a variety, so she just sat down and stared at a blank paper. And then Sunset woke up. Maybe she could help Twilight with the spell. Or... since everybody else was sleeping...
Rated 'Teen' just in case...
What should have happened after the scene in Rainbow Rocks...
Yes, there is a picture in here. It actually inspired the story when I got a bit stumped on it.