But he is way too easy to counter.
What good is that if someone uses one of the above counters?
You guys forget that roar nullifies all the changes, don't you?
There's also choice scarf combined with trick or taunt.
They help me prove my point.
The point is that every decent team counters ninjask pretty hard, because they will always have at least one of the above mentioned traits.
Okay, so you go on and on about how much Ninjask can be countered. How about Baton Passers in general then, why do people use those? Why are they OU? Or perhaps we could just look at every single flaw or counter to every single other Pokemon and question why people even play Pokemon?
Honestly. Be more open-minded to what the good aspects of something are and then look at the bad and see if they really outweigh the good.