<ul data-eligibleForWebStory="false">Piranha Plant Pipeline is considered the rarest track in Mario Kart and can only be played in the smartphone spin-off Mario Kart Tour.The track has not been featured in the Switch game Mario Kart 8 Deluxe, making it exclusive to Mario Kart Tour with limited playability.Fans celebrated the track's return on social media as it was playable for only the third time and will be available until 22nd July.Nintendo has not disclosed plans for Mario Kart World's future updates, leaving fans curious about potential track additions in the upcoming years.