It's time for the Switch to get its own installment of Mario Kart, we thought. Instead, Nintendo announced a Booster Course Pass DLC for Mario Kart 8 Deluxe.
Mario Kart 8 - Wikipedia
Mario Kart 8 Deluxe's Final Booster Course Pass Wave Includes New Tracks, Racers, Music Player, And More - Game Informer
Mario Kart 8 DLC: Wave 4 Release Date and Track Listing
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Nintendo doesn't need Mario Kart 9 when Deluxe is still such a good time
Mario Kart 8 Deluxe Booster Course Pass DLC - Nintendo Switch, Nintendo Switch
Mario Kart 8 Switch DLC with Birdo, Yoshi's Island gets a release date - Polygon
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Sorry, but I think Mario Kart 8 DLC totally beats a Mario Kart 9 announcement
Mario Kart 8 Deluxe Booster Course Wave 4 release date and track list confirmed
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Mario Kart 8 Deluxe Booster Course Pass drives Nintendo Switch to the end of 2023.
Mario Kart 8 Deluxe: Booster Course Pass Wave 4 Track List Revealed, Out Next Week - Game Informer
What's All Coming in the NEW Mario Kart 8 DLC?! [Details You MISSED!]