I was making a hail team on po but it would not let me run timid only rash, that ment I had to use choice scarf. Why?
This means you are using the Event Raikou and its Moves, which is only exclusive to the Rash Nature, nothing else. Same with Event Entei and Suicune, who can only use Adamant(Entei) and Relaxed(Suicune) Natures, nothing else.
