Whenever I try to connect to a battle in Splatoon, it just says "failed to connect to partner's device.”

[GamersInternatio]

Can you just check your NAT type quickly? It’s most likely what @PizzaPizza72 said but I just want to double check.

[Guide] Detecting your NAT type on Wii U and 3DS consoles

[Detecting NAT type on Wii U and 3DS (Guide)] Before I begin, I would like to thank @piplupness and @PN_quarky for helping me test this, as well as some initial information posted by @numerofoxtheglaceon_ on Pretendo’s Discord server. I initially started working on this after information was very vague on how to decode a code that the Connection Test outputs, all I had to go from when I started was a message on a Wii homebrew forum. This is by no means complete yet, we still don’t fully know …