For those without comedic tastes, the so-called "experts" at MarioWiki have a real article on Paper Mario.

Paper Mario Box art.

Paper Mario is a big Mario shame. This shame was for the Nintendo 46 and this game featured Mario, Mario, Mario, Mario, Mario, Wario and Mario. In this game George W. Bush is drawing a bunch of Marios in a piece of paper. Then when he leaves to go to the bathroom the drawings come to life!

The six Marios, plus Wario team up and try to escape from the Black House in Washington C. D and go back to the Mushroom Kingdom...before George is out of the bathroom! Good thing he spends years in there. Can the drawings make it?

This game had a sequel, Paper Mario 2.