While attending one of Pinkie Pie's amazingly scrumdidallilicious parties, Rainbow Dash consumes a Roofie Colada and is abducted by a strange pony from a dimension where everypony's name is Pinocchio so I guess the strange pony's name is Pinocchio.
She wakes up later on the side of a desert road and meets a new friend, Rango the gecko, and they travel to a nearby town only to find out that Pinocchio's world is invading Equestria and Rainbow Dash, her newly acquired gecko friend, and an extremely mustachio'd Sheriff pony (oh, and Iron Man is there) are the only ones who can stop them. Can Rainbow Dash and Rango stop the Pinocchio's in time and bring balance back to Equestria (probably not), or will the Pinocchio's prevail and take over the entirety of Equestria?