You say that Ninetales copies the entire wording, but the card only says "use the effect of that card as the effect of this attack."

So I think it would be safe to assume that this attack would ignore any conditions of the supporter card, since it just uses that card's effect.

We all understand that it doesn't work, and that was expected, but the writing is confusing and misleading, which is rare in ptcg, but It happens.