Okay, how's this for an idea...
As you all know,the Ztar (how do you pronounce that?) Road grants bad people their evil wishes. This is kept in balance by the Star road, which grants people their god wishes. If one of the roads was destroyed, the world could be dramatically altered, which is bad. Now Bowser, learning about the Ztar road from some of his koopa spies, decides the world would be a whole lot better if Mario never went down the Warp Pipe in 1983, so he plans on sealing up the warp pipe so Mario never came.Some of thecronies decide to knock the stars off Star Road, one by one. (Bowser doesn't have good logic.) Boswer shoots down the first Star with his koopa laser beam. The other stars, however, are angry at Bowser, and send his flying backward toward the horizon. Now Mario, who is having yet another Party, suddenly gets beamed on the head with a shooting star from Star road. This Star turns out to be... GENO! Because the Ztar road senses that the Star Road is off balance, the Ztars decide to finish Bowser's plan, and destroy Star road, because they're evil. Then, a dissheveled- looking Bowser arrives at Peach's Castle and tells Mario and company about the whole story. Geno, who has currently taken the from of a cake,(he can't find the Geno doll) forgives Bowser, but Bowser must come along with Geno and help fix Star road. Mario decides he should come along too, in case Bowser does anything stupid. Mario's friends all run home to get their... um...adventuring clothes... but then, suddenly, a Ztar road monster comes at them. Mario takes care of this, and Geno informs Mario and Bowser that the monster is from Ztar road, and it appeared beause the Ztar road is now going to try to fight the Star road, and the Ztar road is probably trying to get rid of Mario and company before they save Star road. Mario, Bowser, and Geno (now a doll agin) leave right awaybuteventually, Peah, Luigi, Yoshi, Mallow, Toad, and Donkey Kong join up with Mario to save Star road. By the way, Wario learns that he can be rich if he destroys the Star Road, so he, Waluigi, and some of Bowser's underlings are Mario's enemies, along with the Ztar road monsters. Eventually, Mario and crew get back to Star road and defeat the Ztar road Ztar sprits, and peace in the Mushroom Kingdom is restored.