I think Mario Kart Tour just became the first-ever 18+ Mario game
Mario Kart Tour has been rated 18+ in Brazil, making it the first Mario game to receive a mature rating. While the exact reason has not been officially disclosed by Nintendo, it is believed to be related to the game's past gambling and loot box mechanics, specifically its 'Spotlight Pipes' which were removed in 2022.
Escapist Magazine
Original source
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