The age-regressed Rainbow that was dropped off by Twi at Canterlot Castle-with everything she would need.
Looks like it's April Fool's Day in Ponyville-and Pinkie and Rainbow are on fire with their practical jokes. Every pony became a victim-except Princess Twilight Sparkle, who stayed inside to avoid the mayhem, watching from one of the windows of her castle. As she went to take a nap, Rainbow and Pinkie quietly went in to pull something off...
Rainbow: You got the red paint??
Pinkie: Are we really gonna do this? If we do, she's gonna grill our plots! Sorry, I'm not gonna get in trouble. Later! *takes off*