SmileBasic for Wii U is compatible with existing SmileBASIC or Petit Computer the 3rd so that all your programs created on Nintendo 3DS can run on the Wii U as well. And you can upload/download your program or download programs published by others from our cloud service for your Wii U to enjoy. By having both versions you can create your program on your Nintendo 3DS when you are outside then continue it on your Wii U when you are home by uploading/downloading your program via our cloud service.