Amazon Japan has posted the official box-art for the Japanese version of Mario and Luigi: Dream Team for the Nintendo 3DS. The game sees Mario, Luigi and Princess Peach take a vacation to Pi’illo Island, where people are able to enter another world via people’s dreams. However, as Luigi has a go on one of these Pillow Portals, a mysterious force pulls Peach inside his dream world. Mario and Luigi must explore both Pi’illo Island and the world inside Luigi’s dreams in order to rescue Peach. The game is due for release in Europe on July 12th and in North America on August 11th.