Did I not just explain that? Sound weakens as you gain distance. Hyper Voice isn't actually a sound attack anyhow. It's rings of energy that produce a harmful sound on contact. It's just accompanied by loud noise.
To further that point, in anything ever related to pokemon, it's depicted as energy like rings. Anything those rings hit, hurts, anything they do not, doesn't. For example,
urg sorry it took me long to respond I had comp issues.
SO where would Sharpedo go? If he goes out the exit/entrance to escape the sound then that is leaving the battlefield
Idk what going underwater solves when Sound can travel though water
Hyper Voice is the loudest and supplementary attack. It hits most pokemon in double/triple battles
SOund waves can go a long way then just simply dodging
ture you could up your stats but then I could attack. But now I realize Swampert still has a chance. Also Swampert can learn Mirror Coat as well. Blazkien is more fond with phsycial then long ranged attacks.