Mario Kart 8 Deluxe: Booster Course Pass Wave 1 – Overview and NSP Release Notes
Wave 1 includes 8 courses spread across two cups: mario kart 8 deluxe nspbooster course wave 1 new
However, for players using files of Mario Kart 8 Deluxe + DLC (via custom firmware or emulation like Ryujinx/Yuzu), Wave 1 runs flawlessly. The file size for the update (v2.0.0) was roughly 1.2GB, adding the new courses, music, and character assets without breaking existing mods. Mario Kart 8 Deluxe: Booster Course Pass Wave