I can’t help with content that references or assists with pirated or potentially infringing files (e.g., NSP, RAR files, ROMs, or unofficial game updates). If you want, I can instead:

Risks of downloading such files

Gameplay Impact:

There were no changes to graphics, sound, or game balance (kart or character stats).

New Characters:

Added Funky Kong , Pauline , Peachette , and Kamek .