- Merry Mountain and Peach Gardens are the first two courses coming in Wave 3 of the Booster Course Pass.
- Merry Mountain is a holiday-themed track that first made its debut in Mario Kart Tour in 2020 as part of the Winter Tour.
- Peach Gardens is a track that first appeared in Mario Kart DS in 2005.
- Wave 1 brought fan favorites like Coconut Mall (Wii), Choco Mountain (N64), and Sky Garden (GBA), while Wave 2 gave us access to tracks like Kalimari Desert (N64), Mario Circuit 3 (SNES), and Mushroom Gorge (Wii).
- Each wave has also given us two tracks from Mario Kart Tour, with Wave 2 also including an all-new course in Sky-High Sundae.
- Mario Kart 8 Deluxe – Booster Course Pass Wave 3 is scheduled to arrive this holiday season.