i can't wait for this game as well. looks like the release is 1 week early.
oh thanks for cut32, i followed the instructions mentioned above and its working perfectly, i can also save I use the EZ Flash 2 Powerstar cart.
I'll definitely be purchasing this game as soon as it comes out...
I took a look at the rail and noticed that the two last pins were soldered for some reason, luckly I still had the rail of my broken joycon so after I swapped them I was able to use it attached to the console