Ignoring him, you book it into Pinkie's bedroom, quickly locating the big plastic ice cream cone and pressing down on its swirly top. Sure enough, the ice cream folds in on itself, activating a trap door beneath you and sending you down a long slide into the pink pony's secret party planning hideout. This is where she keeps everything she needs to do her Pinkie Pie stuff, and hopefully, it's where you'll find what you're looking for.