Mario Kart 8 Switch DLC with Birdo, Yoshi's Island gets a release date - Polygon

Booster Course Pass wave 4 for Mario Kart 8 Deluxe will be released on Nintendo Switch on March 9, Nintendo announced. The DLC for MK8 Deluxe includes a new course, Yoshi’s Island, and new playable character Birdo.

Mario Kart 8 on Switch DLC characters: Who's next? - Polygon

Mario Kart 8 Deluxe's Wave 4 DLC Adds Yoshi's Island & Birdo This Spring

Wave 4 Of Mario Kart 8 Deluxe Booster Pass Heads To Yoshi's Island - Game Informer

Mario Kart 8 Switch DLC with Birdo, Yoshi's Island gets a release date - Polygon

Mario Kart 8 on Switch DLC characters: Who's next? - Polygon

These Are The Mario Kart 8 DLC Packs We Want To See - Feature

Mario Kart 8 - Wikipedia

Mario Kart 8 Deluxe's fourth wave of DLC tracks adds Birdo on March 9th - The Verge

Mario Kart 8 Deluxe DLC news, Wave 6 release date, new tracks