Note: I don't know if its a problem on these forums to talk about emulators? Regardless do not post any links to ISO's.
So the new Dolphin Emulator is out, I don't really know how many people know what it is so I will give a quick explanation.
Its a wii & gamecube emulator, it supports the smash 4 wii u adapter so you can use your gamecube controller on your pc and it also supports wii motes, kongo bongos etc. You can use it to play online, it is commenly used to play SSB: Melee and Project M online. More info on that here: https://www.smashladder.com/help/netplay-guides (I'll take any EU players on that have a decent ping )
Ontop of that this is probably the best supported emulator to ever exist and I use it daily for that glorious 4k downscaled Melee HD. So if you wanna play one of those classics like sunshine or windwaker but do not have a CRT anymore and CBA looking at that ugly upscale, this is the way to go.
For any questions or issues feel to drop a reply and I'll see if I can help.