Aragorn the King
Literally a duck
I'm confused about what you mean. A tier between RU + NU wouldn't exactly work out, because the only place for Pokemon with low usage in RU to go is NU. PU is a tier that has been talked about being implemented, which is basically the NU of NU. But support hasn't been high enough to make it official. I think RU was created because of a) the large about of new mons, and b) popular support, two things that are currently lacked for PU, at least to my understanding.Could there feasibly be another tier between RU and NU right now?
(When) will Smogon introduce a new tier? Are there strict criteria for tier creation, or was it a quick decision to introduce RU simply in response to the large number of Pokemon introduced in Black and White?