Notes:

How to use this exploit
Step.1 clean your Cookies and history in the 3DS browser
Step.2 position yourself near a PC and make sure Box 1's first slot kept free
Step.3 Exit the PC and go to the main menu (Do not close or reset the game) and use the 3DS camera (L+R) and scan the code
Step.4 You'll get a message showing that the exploit works and you'd have to wait it to crash
Step.5 Go back ingame check out what you got

NOTE:This will not work in the recent update