Attaches to your Nintendo 3DS for an enhanced gaming experience Works only with specially designed games for the 3DS. The Circle Pad Pro works only with the 3DS Adds an extra circle pad stick and more shoulder buttons. Attach the Circle Pad Pro to the Nintendo 3DS system and play specially designed games with an additional circle pad and more shoulder control. Circle Pad Pro can only be used with the Nintendo 3DS system and only works with specially designed games displaying the Circle Pad Icon. Please refer to the back of your 3DS game case to see if the game uses the Circle Pad Pro.