Nintendo introduced Wave 4 of the Mario Kart 8 Deluxe DLC Booster Course Pass, and a new track based on Yoshi's Island and Birdo will arrive.
Mario Kart 8 Deluxe – Booster Course Pass, ST, Doubled Dash!! [WAVE 6 AVAILABLE NOW], Page 94
Mario Kart 8 Deluxe DLC Wave 4 Adds Birdo, Yoshi's Island - Siliconera
Wave 4 Of Mario Kart 8 Deluxe Booster Pass Heads To Yoshi's Island - Game Informer
Wave 4 is out now for the Mario Kart 8 Deluxe – Booster Course Pass DLC - Nintendo
Five More Mario Kart 8 Deluxe DLC Characters Teased - Siliconera
Mario Kart 8 Deluxe's Wave 4 DLC Adds Yoshi's Island & Birdo This Spring
The 20 Best Nintendo Switch Games of 2023 - Metacritic
Yoshi's Island course, Birdo character come to Mario Kart 8 Deluxe in Wave 4 DLC
All posts - Siliconera
Reacting to NEW Yoshi's Island Track & Birdo!