From the Super Mario Wiki
The Rainbow Starchute is a glider that appears in Mario Kart Tour. It is a rainbow-colored variant of the Starchute. It resembles the Rainbow Star from Super Mario Galaxy and Super Mario Galaxy 2 but with eyes. It is classified as a tour-exlcusive High-End glider. Unlike the Starchute, however, hitting opponents with Mega Mushrooms yields more points when using this glider.
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