Paper Mario (series)

The Paper Mario series is one of the many sub-series 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 RPGs, though Super Paper Mario is a platfomer. The four games have been released on separate consoles, the Nintendo 64, the Nintendo GameCube, the Wii, and the Nintendo 3DS.

Trivia

 * In all the games, Mario has to fight one or more of his allies at least once. In Paper Mario he fights Lakilester, in Paper Mario: The Thousand Year Door he fights Vivian along with her sisters and the tricked Goombella, Koops, Flurrie and Yoshi with Doopliss, and in Super Paper Mario he fights Bowser and Mr. L twice, and in Paper Mario: Sticker Star, each Wiggler Segment is fought.
 * In all the console games, Mario is able to temporarily transform into an 8-bit version of himself, and each have someone telling a long story with Mario falling asleep. When he wakes up, the storyteller asks if he's been listening, followed by Mario lying by nodding. In Paper Mario, Madam Merlar tells the story. In Paper Mario: The Thousand-Year Door, Luigi and the shopkeeper in Twilight Town tell the stories. In Super Paper Mario, Merlumina tells the story.
 * All four games involve 1 or more giant Bloopers as a boss, and a forest/giant-tree related level or world.
 * All four games involve a fortress of some sorts during the first chapter or area in the game.