Needs to have the bosses attacks (more of like a Monster Hunter or RO game) and be able to learn your attacks mid battle and use them the same if not better (Just one of the many possible "perfect bosses" then again it's our opinions on it)

America isn't trying to kill the animes they are trying it's just hard to match up the mouths and try to get voices at least similar to the japanese.

The japanese way of saying it is Kage Bunshin No Jutsu.