An early version of Mario Kart has been released, including a track editor

The November 1991 build is from nine months before the game was…

Mario Kart DS - Wikipedia

Mario Kart 8 Deluxe Reveals Release Date for Next DLC

Mario Kart 8 / Awesome Music - TV Tropes

Major balance changes accompany Nintendo's fourth wave of new tracks for “Mario Kart 8 Deluxe” – The Observer

When did Mario Kart 8 come out?

Review: 'Mario Kart Tour' is a simple, fun racing game with a troubling monetization platform – GeekWire

Nintendo releases a sixth and final wave of new tracks for “Mario Kart 8 Deluxe” with four returning characters – The Observer

Proto:Mario Kart 8 Deluxe - The Cutting Room Floor

Mario Kart: Super Circuit (Video Game) - TV Tropes

Mario Kart Live 2.0 Update Adds Split-Screen Multiplayer, Four-Player Relay Racing, And More - Game Informer

Nintendo reinvigorates “Mario Kart 8 Deluxe” with waves of new race tracks – The Observer

Mario Kart 8 Review - IGN

Mario Kart 7 (Video Game) - TV Tropes