Mario & Luigi: RPG 4D, known in Japan as Mario & Luigi: RPG Fourth Dimension. Is the fourth title in the Mario & Luigi series. Its release date is unknown currently. The game involves a new storyline where Mario & Luigi will find the past of the Mushroom Kingdom, and even a whole new twisted world.
The story begins with falling stars, it tells about the legend of the dark prophecy and the light prophecy, in which balanced the whole universe, it tells about once a disaster happened, causing a new dimension to appear, the fourth dimension, the balance was fixed then by two heroes. Which now leads to two Heroes, on a huge quest to save the world.