What about an Instacheck 2.0, this time the program sniffs the wireless local communication of a specific MAC address instead of scanning the Wi-Fi current, this way you can delete the update, check your mons since the update is not required for local comunication and download the patch again, this way too you are not connecting your 3DS to anything but the other 3DS you are just using a tool to sniff the data that goes between the two