Assuming you have a legitimate backup of your game and the official update file, here is how to install the on an emuNAND (custom firmware environment).
Master time trials and "no-damage" runs for 100% completion. 📂 File Information & Technical Specs Jet Kave Adventure ROM NSP UPDATE - Switch Game
New updates added Brazilian Portuguese and Traditional Chinese subtitles, expanding the game’s accessibility. Assuming you have a legitimate backup of your