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In the Gamecube version, there is an animation glitch: if Daisy is in the back of the kart and she's hit by a fireball that knocks her into one of the pipes, her "getting burnt" animation will continue until she's hit again or until the battle finishes.
In Mission 3-5 in Mario Kart DS, entering the pipe at the upper left corner will spawn Yoshi at the pipe at the bottom right corner. This is likely to make getting to Gate 5 easier.
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