hey! fun fact! did you know a hidden LAN mode exists for Pokken Tournament? its easily accessible on the Switch version. but for Wii U you have to do a button combo on the title screen. here's the combo, you have to hold it during the duration. L R Dpad Down and start

I hate the trouble connecting to partner's device error!

having trouble connecting? you have to change ur dns setting 88.198.140.154 for prim 1.1.1.1 for sec

IMPORTANT!!! If you can't connect to online in splatoon try to go into the DNS settings set it to manual not auto put 88.198.140.154 in primary and 8.8.8.8 into secondary then it should work atleast it did for me hope this helped and have fun.