From the Super Mario Wiki
10-Point Star (originally parsed 10 Point Star) is a Special Item that Yoshi can collect in Super Mario World 2: Yoshi's Island, and its remake, Yoshi's Island: Super Mario Advance 3. It can be obtained by winning certain minigames. It is worth 10 Stars, giving him 10 more seconds for the Countdown Timer. There is also a similar version special item called a 20-Point Star.
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