give them some credit if they're smart enough to register on the greatest competitive pokemon site then they probably know you cant use OUs in UU.
You know whats something you shouldn't do?!!? Switching Xatu on Rhyperior!!! Unless you run Grass Gem Giga Drain (which isn't actually terribad) or you have amazing guessing skills then Xatu is almost always bad response to rhyperior unless you just cannot stand sr on your team and you have something that can immediately ko rhyperior like gothorita lol.
Also you shouldn't be switching Xatu in most SR users that can kill you in general - crustle is one, i cant tell you how many times i tried to predict and how many times i get destroyed by a rock type sr setter. it just doesn't work well at all. in the same vein switching xatu in froslass is generally a bad idea too although xatu can actually take a few 0spa ice beams with a specially defensive set because froslass is pissy weak.
And i would say not running a raikou counter is bad but its almost as bad not to run an electric immunity (someone already said this for number 20) because specs volt switch raikou/zapdos will probably rape you.
find me at chess.com !!!!!!!!!!!!!!!!!! username= dA_pIFSTER