I don't know if I can because of technicalities. Sometimes, for animations that last longer than the sound, the sound is looped. Take DDD's dair or uair, it's not one long sound, it's one really fast one that loops a bunch. I think nado is the same way, and this makes it pretty much impossible to change.
I tried switching Lucario's neutral+B to Goku's Kamehameha, but the charging aura sphere is composed of four sounds: just started, charging, fully charged, and fired. Except for the last one, they all loop, so when I tried replacing the sounds to Kame-ham-e-ha, it came out as "KamekamekahaamhaamhaamhaamhaamMEHMEHMEHMEHMEHMEHMEHHAAAAAAAAAA"
And then I just put it over his final smash, and that came out pretty decent
tl;dr - If I replaced the nado sound, it'd come out absolutely terrible, which is pretty much what you're going for, so I guess I could?