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The Power of Darkness sealed long time ago has been broken. A mysterious man claiming 'Mr.Dark' obtained this power, seeming to intend to use this power for dominating the world. To stop his evil deeds, Mario and Luigi have to start on an adventure again. A legend has it that only Stars of Brightness can be used to save the world from falling into the darkness. On their way to collecting Stars of Brightness to save the world, the Mario Bros will experience various uncertainties, and some unexpected people may join in their party to go on the adventure with them together. How will their adventure go on, what's the fate of this world later, and what's deal with that mysterious 'Mr.Dark'? Play this episode to find the answer!