All of you wonder what is in that box? And where are the keys?
But do know four of the keys.
She was wrong how she treated her friends they help her make all new dress for the fashion show. At the theater Coco Pommel gave her a gift before left back to Ponyville and it was a spool of rainbow-colored thread and at the end it glow of a multicolored light.
Rainbow Dash's Loyalty
Pinkie Pie's Laughter
She see that Rainbow Dash isn't having fun. After Dash's birth-iversary Cheese Sandwich gives her his Boneless to her and it gives off a multicolored glow.
Four down and two to go. So what do you think the key will be?