Paper Mario: Sticker Star is the fourth installment in the Paper Mario series.
Released for Nintendo 3DS in 2012, Sticker Star followed Paper Mario, Paper Mario: The Thousand-Year Door, and Super Paper Mario. It was the first entry designed specifically for a handheld system, marking a major platform shift for the series.
The adventure centers on Mario and Kersti, a sticker fairy, as they recover six Royal Stickers scattered across the Mushroom Kingdom. Its battle system and progression emphasize collectible stickers, which replaced many traditional role-playing mechanics and became the game's defining feature. Players sometimes confuse its position with Super Paper Mario because that 2007 game changed the series' format substantially, but Super Paper Mario is the third entry. Sticker Star came immediately after it and therefore occupies the fourth position.