Which Paper Mario game followed The Thousand-Year Door in the main series?

The Paper Mario game that followed The Thousand-Year Door in the main series was Super Paper Mario.

The Thousand-Year Door was the second Paper Mario game, released for the Nintendo GameCube in 2004. Super Paper Mario followed it as the third main-series installment, launching for the Wii in 2007. Intelligent Systems again developed the game, but the design changed substantially from the earlier role-playing games.

Instead of relying on traditional turn-based battles, Super Paper Mario combines action role-playing elements with side-scrolling platforming. Its signature mechanic lets Mario flip between two-dimensional and three-dimensional perspectives, revealing hidden paths and objects. Mario, Princess Peach, Bowser, and Luigi are all playable, with different abilities used to solve obstacles.

The later choices can cause confusion because Sticker Star, Color Splash, and The Origami King are also main Paper Mario titles. However, Sticker Star came after Super Paper Mario in 2012. The Thousand-Year Door’s 2024 Nintendo Switch remake does not change the original series order; Super Paper Mario remains the next new game released after it.