Technically, though that was Sticker Star, and modern Paper Mario from that game onwards is a very different beast.
Those games lose the interesting stories and character design and mechanics that made the first two so beloved (Super Paper Mario is its own thing), and are heavily criticised by the fanbase as a result. Sticker Star is usually seen as the worst in the series due to the awkward puzzles, bosses where a single arbitrary item is needed to win and the generic characters and settings, but Color Splash and Origami King get their fair share of criticism too.
My advice to anyone reading this is to skip Sticker Star, maybe watch a Let's Play of Color Splash and try out Origami King if you're willing to accept it'll be nothing like the first two.
It was a fantastic game. If you wanna play you’re in for a treat.