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

The leak was considered "mega" because it provided concrete evidence for tracks across multiple upcoming waves, specifically focusing on Wave 3 and beyond: London Loop (Tour) Peach Gardens (DS) Boo Lake (GBA) Rock Rock Mountain (3DS) Berlin Byways (Tour) Waluigi Stadium (GCN) Merry Mountain (Tour) Rainbow Road (3DS)

Released alongside Wave 2, this update contained leftover data. The leak was considered "mega" because it provided

These music files aligned perfectly with a previous "Prefix Leak" that showed which game system (SNES, GBA, etc.) each slot belonged to, making the predictions near 100% accurate. 🏎️ Completion Status etc.) each slot belonged to

The leak occurred through , which are very short (roughly 1-second) snippets used to prevent audio lag when a race starts. The leak was considered "mega" because it provided