Sadly, every single Pokemon activity card only lets a solitary preserve file. If you would like to build a clean preserve file, you have to very first delete any current information. To do so, go to the Primary Menu and push UP + B + X. Right before your saved information is completely deleted, you will be offered with affirmation messages.
To do so, go to the game’s principal display (wherever it exhibits the famous and tells you to push start out) and at the same time push Up, Pick, and B. This will deliver a menu with the possibility of deleting your activity.