If you want to delete demo games from your 3DS system, there are a few different ways to go about it. The first option is to use the Nintendo 3DS System Settings. From the Home Menu, select System Settings and then select Deletion of Demo Games. To delete demo games from the eShop, open the eShop and select My Account from the top menu. Under My Content, select Downloadable Content and then select Demo Games. To delete demo games from a game card, insert the game card into a compatible device and open the game card menu. Under Game Cards, select Delete Demo Games. ..
