Paper Mario (series)
The Paper Mario series is one of the many of the Mario series. Four games have been released in this series: Paper Mario, Paper Mario: The Thousand-Year Door, Super Paper Mario, and Paper Mario: Sticker Star. Most of the games in the series are strictly RPGs, though Super Paper Mario is a platfomer with RPG elements. The four games have been released on separate consoles, the Nintendo 64, the Nintendo GameCube, the Wii, and the Nintendo 3DS.
Similarities between the games
It is revealed in Mario & Luigi: Paper Jam that the Paper Mario universe exists as a book in the Mario and Luigi universe.