Board Thread:Kart Kingdom/@comment-184.179.123.247-20181129191307/@comment-27050243-20181129204652

Until a feature to makes your own codes is added (and it will likely not happen), only the developers can add codes to the game. The only thing you can do is enter a contest on the blog and if you win, your design will be added to the game and a code will probably be made for it too.