Say it used Dynamic Punch. Would it be possible for the parent to hit, but the child to miss, or vice versa? So, basically, are the two hits separate attacks, or the same attack hitting twice, as with Double Kick, Double Hit, etc.?

And if it hits multiple times, would each hit have the same chance of additional effects, such as Poison Jab's 30% chance possibly being rolled twice, essentially yielding 60% chance of poisoning (even though I'm pretty sure it can't learn that move, just an example)

Disclaimer: I have no idea how you could, but please don't spoil USUM here.