Which Paper Mario game was best-selling in the series as of 2014?

As of 2014, Super Paper Mario was the best-selling game in the Paper Mario series. The Wii title had sold about 4.23 million copies by then, putting it ahead of the earlier series entries in reported worldwide sales.

Super Paper Mario was released in 2007 and stands out because it blends role-playing ideas with side-scrolling platforming. Mario can switch between 2D and 3D perspectives, a mechanic that turns hidden paths, obstacles, and puzzles into part of the game’s central design. Its unusual format helped it reach a broad Wii audience beyond traditional RPG players.

The timing in the question matters. Paper Mario: Sticker Star and Paper Mario: Color Splash had not surpassed it in the relevant sales comparisons, while Paper Mario: The Origami King did not exist yet—it arrived in 2020. Later sales figures still identify Super Paper Mario as the series’ best-selling individual game, although The Origami King had the strongest launch in the franchise.