[spoilers] Mario Kart 8 Deluxe: Booster Course Pass Mega Music Leak May 2026

Released alongside Wave 2, this update contained leftover data.

The leak occurred through , which are very short (roughly 1-second) snippets used to prevent audio lag when a race starts. Released alongside Wave 2, this update contained leftover

The refers to a major security slip where Nintendo accidentally included music prefetch files for unreleased tracks in the Version 2.1.0 update. While the tracks themselves weren't playable at the time, these audio snippets allowed dataminers to identify exactly which retro courses were coming in future waves. 🎵 Key Leaks from the Audio Files Released alongside Wave 2

Dataminers found files with internal names like STRM_BGM_GCN_WALUIGI_STADIUM_32K , which directly mapped to known series tracks. Released alongside Wave 2, this update contained leftover