Which Paper Mario Game Is on N64? Only One: Paper Mario (2000/2001)

Only one: Paper Mario (2000/2001). It's the sole N64 entry in the series.

Later Entries (for reference)

• Paper Mario: The Thousand-Year Door – GameCube
• Super Paper Mario – Wii
• Paper Mario: Sticker Star – 3DS
• Paper Mario: Color Splash – Wii U
• Paper Mario: The Origami King – Switch

If you want the N64 experience, track down the original Paper Mario cartridge.