Circuit Special

As you work in your racing shop, you get a knock at your door. When you open it, a child-sized person with a mushroom on their head shoves a letter in your hands, then runs away. Curious, you open the letter, marked only with your name and a checkered flag, to see the following: CONGRATULATIONS! You have been chosen as the guest racer in the POW! Cup, hosted by the famous Italian plumber brothers. Please prepare your kart and arrive at the racetrack in 3 days. GOOD LUCK!