Yes! Precure 5: The Great Miracle Adventure in the Country of Mirrors(映画 Yes!プリキュア5 鏡の国のミラクル大冒険!)

While Nozomi and her friends are enjoying themselves at Princess Land, an amusement park, Coco and Nuts have been abducted into the Mirror Kingdom. At the same time, Shadow is after the Dream Collet so that he can use the power of the Pinkies to rule the Mirror Kingdom. To prevent this from happening, Migirin and Hidarin, who are residents of the Mirror Kingdom, become allies with Pretty Cure to assist in the fight against Shadow and rescuing Coco and Nuts. Source: Wapedia