Just wondering since I dont have a capture card

I believe so, but not positive about top 10 runs, if someone knows about that correct me if I'm wrong. Settings should just be native and 60hz I think.

Emu is totally fine, though obviously people have a natural preference to get more "legit" runs in the top 10.
Generally though, it's completely allowed.

Thanks I because I perfer doing it on my pc

I use the program Nintendon't and the latest version is 4.586 on my Nintendo Wii.