Originally Posted by Fat Obi
It could work for every Pokemon. Give Machamp BrightPowder and have it use DynamicPunch. Every time it attacks, No Guard is coming into play, and every time it's attacked, BrightPowder is bypassed (so if you are paired with EQ Garchomp).
You are correct that it won't help your ally attacking one of your opponents, though.
I really think everyone is overhyping scarf smeargle. Scarf isn't the best choice for an item in 4v4 doubles, and most opponents will be using lum/chesto berry, making scarf smeargle an easy kill without focus sash or endure.