Why? Because Nintendo shipped the cartridge and base NSP with some performance hiccups. The update patches fix frame rate drops (specifically in Rogueport's hub area), improve load times, and squash audio glitches.
If you are playing via a digital backup (NSP/NSZ/XCI) on an emulator like Ryujinx or Yuzu, or on a custom firmware (CFW) Nintendo Switch, you cannot ignore the . paper mario the thousandyear door nspupdate install
Few games have generated as much hype as the remake of Paper Mario: The Thousand-Year Door (TTYD). Whether you are a veteran who remembers the GameCube original or a new fan drawn to the unique papercraft aesthetics, you want the best experience. improve load times