Click the arrows to change karts. In order to make your own cart, simply create your sprite,take a look at cart number 1, copy all the scripts over to your new sprite, go to the "Cart info" sprite and make a new costume for it that says the name of your cart, and the number it is, for example: type youre username or the name of your cart then you write under it, 39/50. if you are running out of space, change all the cart info costumes to, for example -/50 to -/100 or something like that (- meaning the number of that costume.). Then change all the scripts in your new sprite to something like this: you have a script that says costume # of Racer info = 10. If your cart is, say, the 39th, then change it to =39. so all of your scripts say: Costume # of Racer info =39. then you're set! Make any changes to your cart by slowing or fasting the animation time (the animation script comes built in). add things like buttons or interchangeable cart costumes, or be a BadA and make a 3D Cart like Evo-Profi (10-50) did with the Evo-cart.
Credit to everyone