I also did that for Splatoon and Smash on my 5.5.0 a lot x'Dif you have v.5.5.0 fw, just unblock all connections for a while. Is what I did with Super Mario Maker.
I also did that for Splatoon and Smash on my 5.5.0 a lot x'D
If you are on 5.4.0, you can't do anything right now, if you have 5.3.2, you can use the Spoofer and update it with WUP Installer, if you are under 5.3.2, the same that happens with 5.4.0
https://gbatemp.net/threads/wup-installer-title-installer-firmware-spoofing-5-3-2.397053/im on 5.3.2 but i dont know where to download the update.
I feel like I'm stuck in a box.If you are on 5.4.0, you can't do anything right now