From the Super Mario Wiki
The Platinum Taxi is a kart that appears in Mario Kart Tour, classified as a tour-exclusive High-End kart. It is a white variant of the Yellow Taxi with a top sign reading "2020". Unlike the Yellow Taxi, Mini-Turbos last longer and yield more points when using this kart. Like the Yellow Taxi, the emblem is located on the hood ornament and below the tailfins and it uses the Slim tires from Mario Kart 7.
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