Originally Posted by Fat j0seph
you mean in 4th gen or 5th?
i know that 5thgen battle subway the ai is more intelligent, but in 4th gen battle tower wont shedninja work?
Both, last I remember. I'm pretty sure they'd switch out if they were stuck on an attack that your Pokemon was immune to. It's just that in 5th gen they'd also switch out if they were stuck on a non-damaging attack. Besides, if they start struggling, they'll kill Shedinja.