I know that netplay is not perfect in terms of input response, especially with people like me who have crappy internet. If u decide to click the link below, it will show how to use the Project M Wifi, regardless if the Wii's online capabilities have been discontinued. Keep in mind, it will require an older version of PM, but it's more likely to have a match with little to no lag if using this method, depending on the circumstances.

I want this website to grow, with more content and whatnot. So in that, thanks for reading.

https://m.facebook.com/notes/smash-bros-project-m-melee/how-to-play-project-m-after-wifi-shutdown/1452266188350921