He requested Cheese Sandwich, Gummy, Rainbow Dash, and Pinkie Pie dressed up as the Mad Hatter, the Door Mouse, Alice and the March Hare respectively from Alice in Wonderland celebrating an unbirthday party.Obviously Rainbow Dash is a bit weirded out by this. Something tells me if Cheese Sandwich and Pinkie Pie actually found out about Unbirthdays the parties would never stop.